Description
There are 12 people in a race. How many ways can 1st, 2nd, and 3rd be obtained?
When purchasing a sound system you have 6 choices for speakers, another 8 choices for receiver, and 7 choices for a turntable. How many different systems are available for you to construct?
Explanation & Answer
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1. P(3,12) = 12*11*10=1320
2.systems construct=(6*8*7)=336.....................................................................................................................
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