In how many ways can 2 students be selected from a group of 5 students in a debating competition?
\(In\hspace{1mm} ^{5}C_{2}\hspace{1mm}ways\hspace{1mm}\)
=\(\frac{5!}{(5-2)!2!}\)
=\(\frac{5!}{3!2!}\)
=\(\frac{5\times4\times3!}{3!\times2\times1}\)
=10 ways.
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