Five jokes are listed in a magazine In how many ways can peo

Five jokes are listed in a magazine. In how many ways can people select their three favorite jokes from those listed? People can select their three favorite jokes in ways.

Solution

The number of ways that n objects be chosen out of m objects is \" m choose n\" or, C (m , n) = (m!)/ [ (n!)(m-n)!] . Thus the number of ways that 3 jokes may be cosen out of 5 is 5!/[3! *2!] = 5*4*3*2*1/[ (3*2*1)(2*1)] = 20/2 = 10.