MBA Exam

Rem: 2^90/13 ?Post ur approach too..

1) 1
2) 27
3) 64
4) 81

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MBA Other Question

A and B working alone can do a certain piece of work in 40 days and 120 days respectively. A and B start working together on that work but after having worked for 10 days, the work is increased. The additional work is such that B would take 40 days working alone to complete it. In order to cope with additional load, C is introduced and the remaining work is finished in 5 days. Find the number of days that C alone would take to complete the original work.

1) 8
2) 6
3) 10
4) 12
There are seven black balls and eight red balls in a bag. All of them are identical. Three successive draws of two balls each, were made without replacement. What is the probability of getting two black, one black & one red and two red in the three draws respectively?

1) 28 / 715
2) 21 / 715
3) 7 / 143
4) None of these