MBA Exam

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

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MBA Other Question

There are three hoses, A, B and C, attached to a reservoir. A and B can fill the reservoir alone in 20 and 30 mins,respectively whereas C can empty the reservoir alone in 45 mins. The three hoses are kept opened alone for one minute each in the theorder A, B and C. The same order is followed subsequently. In how many minutes will the reservoir be full?

1) 45
2) 46
3) 47
4) 48
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