Homework Help: PLEASE HELP - DIVISORS PROB

Posted by failureinmath on Thursday, November 15, 2012 at 10:36am.

What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.

PLEASE HELP - DIVISORS PROB - Steve, Thursday, November 15, 2012 at 12:03pm
since 720 = 4*180
and 180 = 2^2 3^2 5
180 has 18 factors:
1 2 4 6 12 18 36
10 20 30 60 90
3 9 15 45 180

I'd say 1/18, since all the factors that are multiples of 4 will be 4 times one of the factors in the list.
PLEASE HELP - DIVISORS PROB - geometrygeeeeek, Friday, November 16, 2012 at 11:26am
thanks alot
PLEASE HELP - DIVISORS PROB - Jacob, Sunday, January 20, 2013 at 12:28pm
3/5

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