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3241004551 [841]
3 years ago
10

Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What

Mathematics
1 answer:
Ad libitum [116K]3 years ago
7 0

Answer:

C) 67%

Step-by-step explanation:

Conditional probability:

P(A given B) = P(A and B) / P(B)

P(passed 2nd given passed 1st) = P(passed 2nd and 1st) / P(passed 1st)

P(passed 2nd given passed 1st) = 0.30 / 0.45

P(passed 2nd given passed 1st) = 0.67

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