Sasha wrote each of the numbers 21 through 40 on a different index card. She will randomly pick one card. A is the event of pick
ing a number that is divisible by 3. B is the event of picking a prime number.
1 answer:
Answer:
Step-by-step explanation:
Given
-- Divisible by 3
--- Prime numbers
Required
This is calculated as:
Using probability formula, we have:
Where:
So:
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