Asked by Maria

How many committees of 2 people are possible from a group of 11?

165
22**
13
55

Answers

Answered by oobleck
22 is not correct
There are 11 choices for the 1st person
There are therefore 10 choices for the 2nd person
But the order does not matter, so divide by 2

11C2 = (11*10)/(1*2) = 55

Time to review permutations and combionations
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