1.

In how many ways can six members be selected from a group of ten members?

Answer»

If ONE PERSON is ALWAYS fixed, we have to select 5 more people from remaining 9.


5 people can be SELECTED out of 9 in C(9,5) ways.


= 9!/(4! 5!) = 9 x 8 x 7 x 6/(4 x 3 x 2 x 1)


= 126 ways



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