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TEA [102]
3 years ago
11

Find the missing probability. P(A)=13/20,P(A∩B)=13/25,P(B|A)=?

Mathematics
1 answer:
Tju [1.3M]3 years ago
4 0

By definition of conditional probability,

P(B | A) = P(A ∩ B)/P(A) = (13/25) / (13/20) = 20/25 = 4/5

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Answer:

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Step-by-step explanation:

The fractions I gave (1/56, 1/6, 1/65,  1/7, 1/75) are all in between 1/5 and 1/8.

A way to think about this is to add a zero to a denominator of 1/5 and 1/8 and turn them into whole numbers:

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Then find number between them:

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Then, turn them into a fraction with a 1 as the numerator and the number as denominators:

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This is the process.  These numbers are all in between 1/5 and 1/8.

I hope this helps you!

(P.S., I don't think this works with negative numbers, though)

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