How many different ways can 3 bus drivers be selected from 11 bus drivers for a public transport service in a city
N=11
n=3
Number of ways "= \\frac{N!}{n!(N-n)}"
"= \\frac{11!}{3!(11-3)!} \\\\\n\n= \\frac{990}{6} \\\\\n\n=165"
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