Boys and girls

There are 11 boys and 18 girls in the classroom. Three pupils will answer. What is the probability that two boys will be among them?

Correct result:

p =  27.0936 %

Solution:

n=11+18=29  C2(3)=(32)=3!2!(32)!=31=3  p=100 (32) 11n 10n1 18n2=100 3 1129 10291 18292=5500203=27.0936%



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Showing 1 comment:
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Math student
Answer is not accurate.correct answer is .2679076632908277

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