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tamaranim1 [39]
4 years ago
14

Of 30 students in a class 17 have a brother, 20 have a sister, and 11 have a brother and a sister. What is the probability that

a randomly selected student has a brother given they have a sister?
Mathematics
1 answer:
dem82 [27]4 years ago
7 0

Answer:

11/30

Step-by-step explanation:

Since there are 30 students in total, and 11 of them have both a brother and a sister, then 11/30 (11 out of the 30 students) would be the probability of a student having a brother given that they have a sister.

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3 years ago
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Maslowich

Answer:

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Step-by-step explanation:

Let the variable be 'x'.

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\rule{150pt}{2pt}

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