Search found 31 matches
Box A contains 2 black chips. Box B contains 2 white chips. Box C contains 1 black chip and 1 white chip. Ted chooses a
Problem Solving
Re: Box A contains 2 black chips. Box B contains 2 white chips. Box C contains 1 black chip and 1 white chip. Ted choose
If the selected chip is black, means we have selected from box A or box C box A: 1st chip is selected box A: 2nd chip is selected box C: black chip is selected We have 3 choices, out of which if any chip from box A is chosen is favourable outcome. Hence we have 2 favourable outcomes out of 3, Requir...
- by dashingnightmare
Mon Jul 27, 2020 1:15 pm- Forum: Problem Solving
- Topic: Box A contains 2 black chips. Box B contains 2 white chips. Box C contains 1 black chip and 1 white chip. Ted chooses a
- Replies: 2
- Views: 441
Re: The letters D, G, I, I , and T can be used to form 5-letter strings
Total number of arrangement without any constraint=5!/2!=60 Number of arrangements in which 2 i's are together=4!=24 number of 5-letter strings can be formed in which the two occurrences of the letter I are separated by at least one other letter= total arrangements-arrangements in which 2 i's are to...
- by dashingnightmare
Mon Jul 27, 2020 1:04 pm- Forum: Problem Solving
- Topic: The letters D, G, I, I , and T can be used to form 5-letter strings
- Replies: 2
- Views: 833
Re: Jack is making a list of his 5 favorite cities. He will choose 3 cities
Choosing 3 cities out of 5=5c3 ways=10
Choosing 2 cities out of 3=3c2 ways=3
Arranging 5 cities =5! ways=120
Required ans=10*3*120=3600
Hence D.
- by dashingnightmare
Mon Jul 27, 2020 1:00 pm- Forum: Problem Solving
- Topic: Jack is making a list of his 5 favorite cities. He will choose 3 cities
- Replies: 2
- Views: 432
Re: Five letters A, P, P, L and E are listed in a row.
Total number of arrangement possible without any constraint= $$\frac{5!}{2!}$$ =60
Let 2 P are together, total arrangement =4*3*2*1=24
Total arrangemet-arrangement in which 2 p are together= arrangementswhich have at least one letter between the two Ps
Hence 60-24=36
Hence C.
- by dashingnightmare
Mon Jul 27, 2020 12:55 pm- Forum: Problem Solving
- Topic: Five letters A, P, P, L and E are listed in a row.
- Replies: 3
- Views: 428
Re: Six children, Arya, Betsy, Chen, Daniel, Emily, and Franco, are to be
If there was no constraint : Total number of ways=6*5*4*3*2*1=720 Suppose Betsy and Emily are sitting next to each other, hence we will consider them as one entity: Total arrangements in this case=5*4*3*2*(2!) 2! is coming because betsy and emily can be arranged in 2!ways Now, total arrangements-arr...
- by dashingnightmare
Mon Jul 27, 2020 12:48 pm- Forum: Problem Solving
- Topic: Six children, Arya, Betsy, Chen, Daniel, Emily, and Franco, are to be
- Replies: 4
- Views: 579
Re: Thai village crafts
Here we are comparing thai village crafts with other crafts,
Like those of makes sense, where those refers to other crafts
Hence E
- by dashingnightmare
Mon Jul 27, 2020 12:36 pm- Forum: Sentence Correction
- Topic: Thai village crafts
- Replies: 2
- Views: 698
Re: Over a certain time period, did the number of shares of stock in Ruth's...
Question is whether shares of stock increased? 1) Over the time period, the ratio of number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased $$\frac{stock}{stock+bond}$$ so maybe stocks increased or maybe bond decreased , both cases will increase the...
- by dashingnightmare
Mon Jul 27, 2020 12:27 pm- Forum: Data Sufficiency
- Topic: Over a certain time period, did the number of shares of stock in Ruth's...
- Replies: 1
- Views: 320
A certain diet program calls for eating daily calories from carbohydrates, proteins, and fats in the ratio of...
Data Sufficiency
Re: A certain diet program calls for eating daily calories from carbohydrates, proteins, and fats in the ratio of...
We have to fix carbohydrates, proteins, and fats in the ratio of 40:30:30. 1) One of the meals Bill ate contained 80 grams of carbohydrates, 60 grams of protein, and 60 grams of fat. This statement talks about one of the meals, although in this meal ratio seems to be perfect, but we dont know about ...
- by dashingnightmare
Mon Jul 27, 2020 12:16 pm- Forum: Data Sufficiency
- Topic: A certain diet program calls for eating daily calories from carbohydrates, proteins, and fats in the ratio of...
- Replies: 1
- Views: 308
At Walter's Sub Shop, Walter provides a free sub to a customer after the customer buys 4...
Problem Solving
Re: At Walter's Sub Shop, Walter provides a free sub to a customer after the customer buys 4...
For buying 10 subs,
kelvin needs subs 2 set of 5 subs, that is he needs to buy 8 and 2 will be free
now cost for 8 subs=8x
sales tax of 10 subs=10x*5/100=0.5x
Total cost=8x+0.5x=8.5x
Hence A.
- by dashingnightmare
Mon Jul 27, 2020 12:01 pm- Forum: Problem Solving
- Topic: At Walter's Sub Shop, Walter provides a free sub to a customer after the customer buys 4...
- Replies: 1
- Views: 329
A used cars salesman receives an annual bonus if he meets a certain quota. This year, the salesman has so far sold...
Problem Solving
Re: A used cars salesman receives an annual bonus if he meets a certain quota. This year, the salesman has so far sold..
Let the quota last year=100
This year sold=1/5 of 100=20
This year quota is reduced by 25% from last year,
so 75%of last year quota= 75% of 100= 75
He still need to sell = 75-20=55 cars
required fraction=55/100=11/20
Hence D.
- by dashingnightmare
Mon Jul 27, 2020 11:56 am- Forum: Problem Solving
- Topic: A used cars salesman receives an annual bonus if he meets a certain quota. This year, the salesman has so far sold...
- Replies: 1
- Views: 381
The graph of the equation \(xy = k,\) where \(k < 0,\) lies in which two of the quadrants shown above?
Problem Solving
Re: The graph of the equation \(xy = k,\) where \(k < 0,\) lies in which two of the quadrants shown above?
since, xy=k, and k<0 implies that one of x or y is -ve and other one is +ve
cases1 : x is negative,y is positive =>quadrant 2
case2: x is positive, y is negative,=>quadrant 4
Hence D.
- by dashingnightmare
Sun Jul 26, 2020 12:11 am- Forum: Problem Solving
- Topic: The graph of the equation \(xy = k,\) where \(k < 0,\) lies in which two of the quadrants shown above?
- Replies: 1
- Views: 287
Working together, Jeff and Ashley painted their apartment in 6 hours. If Jeff had been working alone, he could have pain
Problem Solving
Re: Working together, Jeff and Ashley painted their apartment in 6 hours. If Jeff had been working alone, he could have
let total unit of work required to paint=60
both can paint in 6 hours, so 10 unit/hr
jeff can paint in 10 hours, so 6 unit/hr
=>ashley does 4 unit/hr
so it will take ashley 60/4hr=15
C is the correct answer
- by dashingnightmare
Sun Jul 26, 2020 12:08 am- Forum: Problem Solving
- Topic: Working together, Jeff and Ashley painted their apartment in 6 hours. If Jeff had been working alone, he could have pain
- Replies: 1
- Views: 293
At a restaurant, all tips are added together to be split among the employees at the end of a shift...
Problem Solving
Re: At a restaurant, all tips are added together to be split among the employees at the end of a shift...
D
- by dashingnightmare
Sat Jul 25, 2020 12:35 pm- Forum: Problem Solving
- Topic: At a restaurant, all tips are added together to be split among the employees at the end of a shift...
- Replies: 3
- Views: 382
All employees of Company \(A\) and Company \(B\) work together on some project. The ratio of the number of employees in
Problem Solving
Re: All employees of Company \(A\) and Company \(B\) work together on some project. The ratio of the number of employees
No of worker in company A:B=5/6
Each employee of A can do the work 3 times faster than each employee of B
So every worker will be equivalent to 3 worker in A
so no of worker in A=21 B=6, considering all are working with same speed
required ratio=6/21=2/7
Hence,B
- by dashingnightmare
Fri Jul 24, 2020 11:09 pm- Forum: Problem Solving
- Topic: All employees of Company \(A\) and Company \(B\) work together on some project. The ratio of the number of employees in
- Replies: 1
- Views: 284
Re: For non-negative integers \(x, y,\) and \(z,\) is \(x^z\) odd?
1. Product xz is odd,
This is possible when x and z are both odd, hence x^z will be odd, sufficient
2. x=2^y
y=0,x=1.
y=1,x=2
x^z can be even or odd depending on values of x, also we dont know value of z, not sufficient
Correct ans:A
- by dashingnightmare
Fri Jul 24, 2020 11:02 pm- Forum: Data Sufficiency
- Topic: For non-negative integers \(x, y,\) and \(z,\) is \(x^z\) odd?
- Replies: 1
- Views: 329