Sales

From statistics of sales goods, item A buy 51% of people and item B buys 59% of people. What is the probability that from 10 people buy 2 item A and 8 item B?

Correct result:

p =  17.2 %

Solution:

p1=0.51 p2=0.59 C2(10)=(102)=10!2!(102)!=10921=45  p=100 (102) p12 p28=100 45 0.512 0.598=17.2%



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