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olasank [31]
3 years ago
11

In a class of 30 students, 6 have a brother and 12 have a sister. There are 14 students who do not have any siblings. What is th

e probability that a student chosen randomly from the class has a brother and a sister?
Mathematics
1 answer:
NeTakaya3 years ago
6 0

Answer:

32 siblings from the class theres a possibility that some students had more siblings and not everyone has one

Step-by-step explanation:

.

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Answer:

0.7429

Step-by-step explanation:

Given that  Of the 721 students at the college, 299 of them apply for loans when entering graduate school.

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Each student is independent of the other and there are two outcomes

Hence out of 45 students the no of students who apply for loans say X is binomial with n =45 and p = 0.415

the probability that more than 16 of them apply for loans

=P(X>16)\\= \Sigma_{x=17} ^{45}  P(x)\\=\Sigma_{x=17} ^{45}(45Cx (0.415)^x (0.585)^{25-x} )

=0.7429

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Step-by-step explanation:

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