Asked by Rashid

In how many ways can a student select three couses from seven available courses?
Answered by Reiny
Isn't that just 7 choose 3 ??
Answered by Rashid
Yeah.if we follow the rule of combination the ans comes 35 but the ans is showing 28..but how?
Answered by Damon
7!/[ 3! * 4! ]

7 * 6 * 5 / 3*2

35 all right
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