Homework Answers
17 members can be selected from a group of 20 by, 20C17 = 1140 ways
Therefore, there are 1140 ways to select these seventeen members.
Note:
20C17
= 20! / 17! * (20 - 17)!
= 20 * 19 * 18 * 17! / 17! * 3!
= (20 * 19 * 18 ) / ( 3 * 2 *1)
= 6840 / 6
= 1140
=
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