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Suppose we want to choose 5 objects, without replacement, from 9 distinct objects. (a) How many ways can this be done, if the order of the choices is not taken into consideration? (b) How many ways can this be done, if the order of the choices is taken into consideration?

Sagot :

Cutydragyidn

Answer:

a. 126

b. 15120

Step-by-step explanation:

5 chose 9 = 9 * 8 * 7 * 6 * 5/1/2/3/4/5 = 126

if order matters...

9*8*7*6*5 = 15120

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