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Question

In how many ways can a student select three couses from seven available courses?
9 years ago

Answers

Reiny
Isn't that just 7 choose 3 ??
9 years ago
Rashid
Yeah.if we follow the rule of combination the ans comes 35 but the ans is showing 28..but how?
9 years ago
Damon
7!/[ 3! * 4! ]

7 * 6 * 5 / 3*2

35 all right
9 years ago

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