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In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student has a sister given that they have a brother?

Has a brother Does not have a brother

Has a sister 5 7

Does not have a sister 11 4

Respuesta :

Matheng

Answer:

0.185

Step-by-step explanation:

Given:

                                       Has a brother            Does not have a brother

Has a sister                            5                                        7

Does not have a sister          11                                        4

So, The total number of the students in the class = 5 + 7 + 11 + 4 = 27

The number of student has a sister given that they have a brother = 5

∴ The probability = 5/27 = 0.185

The probability that a student has a sister given that they have a brother = 0.185

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