Possibilities???????

At an annual flower show, 6 different entries are to be arranged in a row.

a)How many different arrangements of the entries are possible?

b)If the owners of the 1st, 2nd and 3rd place entries will be awarded prizes of $100, $50 and $25 respectively, how many ways can the prizes be awarded?



Thanks for any help!

Possibilities???????
a) 6*5*4*3*2*1 = 720

b) 6*5*4 = 120

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