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A math teacher gave her class two tests. 70% of the class passed both tests and 80% of the class passed the first test. What percent of those who passed the first test also passed the second test?

70%

75.5%

87.5%

None of the choices are correct.

Verified Answer :

aspam

You have to find 70% of 80 First to figure out the Percentage.
70= 80*x / 100, 7000/80 =x, x = 700/8 = 87.5%. Therefore, your answer would be 87.5%.

MrRoyal

The percentage that pass the second test is 87.5%

How to determine the percentage?

Let the percentage that pass the first test be x, and the second test be y.

So, we have:

x = 80%

x and y = 70%

The percentage that pass both tests is calculated using:

x and y = x y

So, we have:

80% y = 70%

Divide both sides by 80%

y = 87.5%

Hence, the percentage that pass the second test is 87.5%

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