SSC Government Jobs Exams Numerical Ability Permutation and Combination

A committee of 5 is to be formed from 6 male students and 5 female students.In how many ways can this be done so that the committee contains at least one male and one female students?

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SSC Other Question

29 sheep can feed a uniformly growing grass in 7 days and 25 sheep can feed the same in 9 days. How many sheep will be required to feed it in 6 days? A salesman travels a distance of
50
km in
2
hours and
30
minutes. How much faster, in kilometers per hour, on an average, must he travel to make such a trip in
5
6
hour less time?"