I need help statics

label Statistics
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  1. Fifty percent of the people that get mail-order catalogs order something. Find the probability that only four out of ten people getting these catalogs will order something. 
May 20th, 2015

for the probability of is initially 50%=0.5

when broken down to 10 people, then the probability is 4/10

the final probability is (4/10)*0.5

=0.2

May 20th, 2015

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May 20th, 2015
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May 20th, 2015
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