Gradutate Record Exam

1. Given three series
l: x, 2x, 3x, 4x, 5x
ll: x, x+1, x+2, x+3
lll: 1/x,1/x+1,1/x+2,1/x+3
Which of the series has same mean and median?

2. In a class of 20 students, one half of the students are boys, if a teacher has to select 7 students and the first 6 are girls
Col a: What is the probability that the 7th student is a girl
Col b:2/7

3. There was a ladder given. The ladder is of length 5 and it is displaced i.e slanted downwards such that it falls 'x'mts in height and its horizontal length increases by 'y'mts.
Col A: x
Col B: y

4. If the probability of not raining tomorrow is 0.56, then
Col A: Probability of not raining tomorrow, when temperature is above 85 centigrade
Col B: 0.58

5. Col A: 10! + 9!
Col B: 10(9!)

6. If x & y are the integers between 13 & 29, then for 5+x/7+y how many sets of values of x & y for the given expression will be in same ratio?

7. If x/x-1 = x-2/x+1
Col A: x
Col B: 2/3