Search found 9 matches
The question is asking what percent of lights that are switched on are supposed to be switched off? let total lights be = 100 so 80% or 80 are supposed to be switched on, and 40% of lights that are supposed to be switched off are on, hence 40% of remaining 20 which are supposed to be off are on. i.e...
- by kunal_kc
Sun Jan 31, 2010 7:50 pm- Forum: Problem Solving
- Topic: Hotel California
- Replies: 12
- Views: 3449
let additional hours= x
so We get the below equation:
40*6 + 60*x / 6+x = 55
solving for x we get x = 18
hence total journey = 18+6 = 24 hours.
- by kunal_kc
Sun Jan 31, 2010 2:47 am- Forum: Problem Solving
- Topic: how many long hours is the trip
- Replies: 5
- Views: 1039
- by kunal_kc
Sat Jan 30, 2010 11:17 pm- Forum: Problem Solving
- Topic: for which of the frequency distributions is the mean equal
- Replies: 19
- Views: 3186
I did it by the basic method by finding the mean and median for each.. First take the mean for all by = sum of numbers / number of terms, so mean for R= 86/20 Q= 84/21= 4 P= 68/17=4 then find the median (middle number or average of middle numbers if number of terms is odd) which for P & Q is als...
- by kunal_kc
Sat Jan 30, 2010 3:52 am- Forum: Problem Solving
- Topic: for which of the frequency distributions is the mean equal
- Replies: 19
- Views: 3186
oops, sorry thanks for correcting me. then you can just take from 1,2 but why you couldn't solve using 2,3. it does satisfy the equation.
- by kunal_kc
Tue Jan 26, 2010 6:15 am- Forum: Problem Solving
- Topic: x > y , x^2-1 > y^2 -4y + x -1
- Replies: 9
- Views: 3278
if you take x=-2 and y=-3, the equation does not satisfy so y has to be greater than = to 0
next if you take x=1 and y=0, still the equation does not satisfy so y has to be grater than 0
try x=2 and y=1, the equation satisfies hence y can be anything greater than 0
so answer is B
- by kunal_kc
Tue Jan 26, 2010 5:47 am- Forum: Problem Solving
- Topic: x > y , x^2-1 > y^2 -4y + x -1
- Replies: 9
- Views: 3278
Lets assume below -:
John's speed = x
Jack's speed = y
so we will have 2 equations -:
eq1
x + y = 20
eq2 (increasing jack's speed by 25%)
x + 1.25y = 22
By solving the 2 equations you will get
x= 12
y= 8
hence ratio will be 8/12=2/3 (ANS D)
- by kunal_kc
Mon Jan 25, 2010 10:43 pm- Forum: Problem Solving
- Topic: typing problem
- Replies: 1
- Views: 2122
- by kunal_kc
Mon Jan 25, 2010 5:36 pm- Forum: Problem Solving
- Topic: question 2
- Replies: 9
- Views: 5207
i did the by the following way -:
first find the area: pie x 49/256
and then multiply by the area by 2 to get in miles, and my answer is coming A
comments please
- by kunal_kc
Sat Jan 23, 2010 11:29 pm- Forum: Problem Solving
- Topic: question 2
- Replies: 9
- Views: 5207