In a math class of 30 students, 17 are boys and 13 are girls. on a unit test, 4 boys and 5 girls made an a grade. if a student is chosen at random from the class, what is the probability of choosing a girl or an a student?

There are 13 girls and 4 more students that are boys that made an A grade. Thus there are 13+4=17 students that are either girls or A students.

The probability of choosing a girl or A student is 17/30.

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abidemiokin abidemiokin · Answer 2 · 2021-10-01T13:35:39+02:00

The probability of choosing a girl or an A student is 17/30

Probability is the likelihood or chance that an event will occur. It is expressed as:

Probability = Expected outcome/Total outcome

If the total number of students in the math class is 30 students, hence:

Total outcome = 30

Since there are 13 girls

Expected outcome = 13

Pr(choosing a girl) = 13/30

Since 4 more boys or girls made an A grade, the probability of a student to make an A grade = 4/30

Pr(choosing a girl or an A student) = 13/30 + 4/30

Pr(choosing a girl or an A student) = 17/30

Hence the probability of choosing a girl or an A student is 17/30

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