Math homework help! Please!

Posted on 2013-12-19 11:09:00 in Math by PRADA PURSE :D

A. How many license plates are their with two letters followed by four digits (repetition is allowed)



B. How many ways can you select 3 days out of a week?



C. In how many ways can you select a 4-member committee from a 20 member club if the president of the club must be on the committee?



I am reviewing for a test and these problems confused me, can someone help explain? Thank you!

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