A student committee on academic integrity has 90 ways to select a president and vice president from a group of candidates. The same person cannot be both president and vice president. How many candidates are there?
a)7
b)8
c)9
d)10
e)11
OA is D
i know N!/n-2 = 90 and only 10.9 fits to the choice and 10 is the answer. is their any other way to do this question?
a)7
b)8
c)9
d)10
e)11
OA is D
i know N!/n-2 = 90 and only 10.9 fits to the choice and 10 is the answer. is their any other way to do this question?
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