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The expenses of a dormitory are partly fixed and partly variable
The expenses of a dormitory are partly fixed and partly variable. It costs $12 per head per day if there are 20 students and $11 per head per day if there are 25 students. What will be the cost per head per day if the number of students increases to 40?
A. $8
B. $8.5
C. $9
D. $9.5
E. $10
- by Evo23
Sun May 10, 2020 1:39 am- Forum: Problem Solving
- Topic: The expenses of a dormitory are partly fixed and partly variable
- Replies: 0
- Views: 475
A mixture of 50 litres of milk and water containing 20% water is further diluted with water so that the mixture has 30%
Problem Solving
A mixture of 50 litres of milk and water containing 20% water is further diluted with water so that the mixture has 30%
A mixture of 50 litres of milk and water containing 20% water is further diluted with water so that the mixture has 30% water in it. How many litres of water should be added?
A. 40/70
B. 4/7
C. 6.14
D. 7
E. 7.14
- by Evo23
Fri May 08, 2020 4:21 pm- Forum: Problem Solving
- Topic: A mixture of 50 litres of milk and water containing 20% water is further diluted with water so that the mixture has 30%
- Replies: 0
- Views: 403
What are the coordinates of the foot of the perpendicular from the point (2,2) to the line y - 2x - 8 =0? A. (4,-2) B. (
Problem Solving
What are the coordinates of the foot of the perpendicular from the point (2,2) to the line y - 2x - 8 =0? A. (4,-2) B. (
What are the coordinates of the foot of the perpendicular from the point (2,2) to the line y - 2x - 8 =0?
A. (4,-2)
B. (-4,2)
C. (2,4)
D. (2,-4)
E. (-2,4)
- by Evo23
Fri May 08, 2020 4:19 pm- Forum: Problem Solving
- Topic: What are the coordinates of the foot of the perpendicular from the point (2,2) to the line y - 2x - 8 =0? A. (4,-2) B. (
- Replies: 0
- Views: 385
What is the equation of the line parallel to the line 2x - 7y =20 and making an intercept of 7 on the x axis? A. 2x - 7
Problem Solving
What is the equation of the line parallel to the line 2x - 7y =20 and making an intercept of 7 on the x axis? A. 2x - 7
What is the equation of the line parallel to the line 2x - 7y =20 and making an intercept of 7 on the x axis?
A. 2x - 7y =7
B. x - y = 7
C. 2x - y = 7
D. x - 7y = 14
E. 2x -7y =14
- by Evo23
Fri May 08, 2020 4:18 pm- Forum: Problem Solving
- Topic: What is the equation of the line parallel to the line 2x - 7y =20 and making an intercept of 7 on the x axis? A. 2x - 7
- Replies: 0
- Views: 400
Twenty cars arrived at a service station. 5 of them had a fault in the running gear, 8 had a fault in the motor and 10 h
Problem Solving
Twenty cars arrived at a service station. 5 of them had a fault in the running gear, 8 had a fault in the motor and 10 h
Twenty cars arrived at a service station. 5 of them had a fault in the running gear, 8 had a fault in the motor and 10 had no faults. What is the probability that a car has faults both in the running gear and in the motor?
A. 1/10
B. 1/20
C. 2/20
D. 3/20
E. 4/10
- by Evo23
Fri May 08, 2020 4:17 pm- Forum: Problem Solving
- Topic: Twenty cars arrived at a service station. 5 of them had a fault in the running gear, 8 had a fault in the motor and 10 h
- Replies: 0
- Views: 353
Two workers A and B working together complete a job in 5 days. If A worked twice as efficiently as he did and B worked o
Problem Solving
Two workers A and B working together complete a job in 5 days. If A worked twice as efficiently as he did and B worked o
Two workers A and B working together complete a job in 5 days. If A worked twice as efficiently as he did and B worked one third as efficiently as he did, the work can be completed in 3 days. Working alone how many days will A take to complete the job?
A. 15
B. 15/4
C. 25
D. 25/3
E. 25/4
- by Evo23
Fri May 08, 2020 4:16 pm- Forum: Problem Solving
- Topic: Two workers A and B working together complete a job in 5 days. If A worked twice as efficiently as he did and B worked o
- Replies: 0
- Views: 353
What is the probability that an integer chosen randomly from 1000 to 9999 will have 5 in the thousand's place? A. 1000/
Problem Solving
What is the probability that an integer chosen randomly from 1000 to 9999 will have 5 in the thousand's place? A. 1000/
What is the probability that an integer chosen randomly from 1000 to 9999 will have 5 in the thousand's place?
A. 1000/9999
B. 1/10
C. 5/10
D. 1/9
E. 5/9
- by Evo23
Fri May 08, 2020 4:14 pm- Forum: Problem Solving
- Topic: What is the probability that an integer chosen randomly from 1000 to 9999 will have 5 in the thousand's place? A. 1000/
- Replies: 0
- Views: 353
How many 4 digit positive integers greater than 3400 can be formed from the digits 1,2,3,4,5,6,7 if none of the digits r
Problem Solving
How many 4 digit positive integers greater than 3400 can be formed from the digits 1,2,3,4,5,6,7 if none of the digits r
How many 4 digit positive integers greater than 3400 can be formed from the digits 1,2,3,4,5,6,7 if none of the digits repeat?
A. 144
B. 196
C. 560
D. 1372
E. 1568
- by Evo23
Fri May 08, 2020 4:13 pm- Forum: Problem Solving
- Topic: How many 4 digit positive integers greater than 3400 can be formed from the digits 1,2,3,4,5,6,7 if none of the digits r
- Replies: 0
- Views: 353
The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the two digits dif
Problem Solving
The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the two digits dif
The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the two digits differ by 3, find the 2 digits of the number?
A. 8,5
B. 6,9
C. 6,3
D. 7,3
E. 7,4
- by Evo23
Fri May 08, 2020 4:12 pm- Forum: Problem Solving
- Topic: The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the two digits dif
- Replies: 0
- Views: 372
A sample of 20 gallons of gasoline is found to be adulterated to the extent of 15%. How much pure gasoline should be add
Problem Solving
A sample of 20 gallons of gasoline is found to be adulterated to the extent of 15%. How much pure gasoline should be add
A sample of 20 gallons of gasoline is found to be adulterated to the extent of 15%. How much pure gasoline should be added to bring up the level of purity to 95%?
A. 20
B. 25
C. 30
D. 40
E. 45
- by Evo23
Fri May 08, 2020 4:11 pm- Forum: Problem Solving
- Topic: A sample of 20 gallons of gasoline is found to be adulterated to the extent of 15%. How much pure gasoline should be add
- Replies: 0
- Views: 590
What is the probability that a two digit positive integer selected at random will be divisible by either 3 or 7?
Problem Solving
What is the probability that a two digit positive integer selected at random will be divisible by either 3 or 7?
What is the probability that a two digit positive integer selected at random will be divisible by either 3 or 7?
A. 2/9
B. 3/9
C. 42/90
D. 46/90
E. 39/90
- by Evo23
Fri May 08, 2020 4:09 pm- Forum: Problem Solving
- Topic: What is the probability that a two digit positive integer selected at random will be divisible by either 3 or 7?
- Replies: 0
- Views: 383
Working alone A can do a job in 24 days, while B will take 12 days
Working alone A can do a job in 24 days, while B will take 12 days. Working together, B and C will take 8 days; working together A and D will take 16 days. If all four of them worked together and got $ 9000 for completing the task, what is D's share of $ 9000? A. $1000 B. $2000 C. $3000 D. $4000 E. ...
- by Evo23
Fri May 08, 2020 4:08 pm- Forum: Problem Solving
- Topic: Working alone A can do a job in 24 days, while B will take 12 days
- Replies: 0
- Views: 339
What is the sum of all 3 digit positive integers that leave
What is the sum of all 3 digit positive integers that leave a remainder of 2 when divide by 3?
A. 163900
B. 163751
C. 164700
D. 164850
E. 165000
- by Evo23
Fri May 08, 2020 4:07 pm- Forum: Problem Solving
- Topic: What is the sum of all 3 digit positive integers that leave
- Replies: 0
- Views: 310
A train traveling at a speed of 81 mph overtakes a freight train traveling at a speed
Problem Solving
A train traveling at a speed of 81 mph overtakes a freight train traveling at a speed
A train traveling at a speed of 81 mph overtakes a freight train traveling at a speed of 45 mph in 3 minutes. If the length of the train is 1100 meters, what is the length of the freight train? (1mile=1.6km)
A. 1100
B. 1440
C. 1780
D. 1880
E. 2880
- by Evo23
Wed May 06, 2020 7:32 am- Forum: Problem Solving
- Topic: A train traveling at a speed of 81 mph overtakes a freight train traveling at a speed
- Replies: 0
- Views: 399
What number must be added to each of 2, 16, 20, 52 so that the results are in proportion?
Problem Solving
What number must be added to each of 2, 16, 20, 52 so that the results are in proportion?
What number must be added to each of 2, 16, 20, 52 so that the results are in proportion?
A 5
B 7
C 10
D 11
E 12
- by Evo23
Wed May 06, 2020 5:29 am- Forum: Problem Solving
- Topic: What number must be added to each of 2, 16, 20, 52 so that the results are in proportion?
- Replies: 1
- Views: 576