MBA Exam

Out of 20 consecutive natural numbers, in how many ways can 4 numbers be selected, such that any two among the selected numbers differ by at least 3?(A) 20C3 / 3(B) 17C4(C) 23C4(D) 14C4

1) A
2) B
3) C
4) D

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MBA Other Question

X,Y,Z invest, in a partnership.the amount that each of them invest is in the ratio of x:y:z and their profits are in the ratio of z:y:x,the ratio of their period of investments is?pl. provide sol. also.

1) x^2:y^2:z^2
2) xy:yz:zx
3) z^2:zx:x^2
4) x^2:xz:z^2
What is the sum of the digits of least multiple of 13 which when divided by 6,8 and 12 leaves 5, 7 and 11 remainder respectively ?

1) 6
2) 7
3) 8
4) 9