If set A={a,b,c,d,e}, what is the number of subsets that must include only 3 elements?
\(= 5C2\)
\(= \frac{5!}{2! * 3!}\)
\(= 5 * 2\)
\(= 10\)
Hence, Answer is B
\(= 5C2\)
\(= \frac{5!}{2! * 3!}\)
\(= 5 * 2\)
\(= 10\)
Hence, Answer is B
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