MBA Exam

Two distinct A and B are selected from set{1,2,3,4....39,40}. Find probability that AB is divisible by 3.

1) (13c127c1+13c2)/40C2
2) 3/10
3) (13c139c1)/40c2
4) 1339/4039

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MBA Other Question

x and y are complex numbers such that x2 + y2 = 7, x3 + y3 = 10. What is the smallest possible real value of x + y?

1) -5
2) -1
3) 6
4) None of these
find the probability that the year chosen at random has 53 mondays ?

1) 5/28
2) 3/28
3) 1/28
4) 2/28