We need to find **P(boy OR girl with A OR girl with C)**

= P(boy) + P(girl with A) + P(girl with C)

which is equivalent to:

1 - P(girl with B)

former = 44/78 + 3/78 + 14/78 = 61/78

latter = 1 - 17/78 = 61/78

**61/78**

Natalia K.

asked • 10/31/20Giving a test to a group of students, the grades and gender are summarized below

A | B | C | Total | |

Male | 15 | 19 | 10 | 44 |

Female | 3 | 17 | 14 | 34 |

Total | 18 | 36 | 24 | 78 |

If one student is chosen at random,

Find the probability that the student was NOT a female that got a "B"

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We need to find **P(boy OR girl with A OR girl with C)**

= P(boy) + P(girl with A) + P(girl with C)

which is equivalent to:

1 - P(girl with B)

former = 44/78 + 3/78 + 14/78 = 61/78

latter = 1 - 17/78 = 61/78

**61/78**

If we are choosing students at random from all students who got a B:

Total number of non-female students who got a B: 19

Total number of students who got a B: 36

Probability: 19/36

If we are choosing students at random from all students:

Total number of non-female students who got a B: 19

Total number of students: 78

Probability: 19/78

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