In a class of 30 students, 5 have a brother and 20 have a sister. There are 2 students who have a brother and a sister. What is the probability that a student who has a brother also has a sister?

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Radek Lopatecki asked Sep 9, 2022

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In a class of 30 students, 5 have a brother and 20 have a sister. There are 2 students who have a brother and a sister. What is the probability that a student who has a brother also has a sister?

Mathematics
high-school

Radek Lopatecki asked Sep 9, 2022

by Radek Lopatecki

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19 votes

Answer: 2/5

Explanation:

In a class of 30 students, 5 have a brother and 20 have a sister. There are 2 students-example-1

Mrpatg answered Sep 13, 2022

by Mrpatg

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