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I need quick help with this!! 15 PTS POSSIBLE!!! i know for sure its not 3/50, but i think its 3/20? and explain your reasoning.

I need quick help with this!! 15 PTS POSSIBLE!!! i know for sure its not 3/50, but-example-1
User Valeriy Katkov
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1 Answer

16 votes
16 votes

Answer:

3/20

Explanation:

Given:

Probability that it is Monday and that a student is absent is 3/100

Probability that a randomly selected day of the school week is monday is 1/5

To Find:

What is the probability that a student is absent given that today is Monday.

Solve:

It may be different if it were on a Wednesday. Because we expect fewer absentees on Wednesday than on Monday/ Friday. In these cases the conditional probability, P(absent/weekday) would differ depending on the day of the week.

3/100 ÷ 1/5 = 3/20

The probability that a student is absent on a Monday is 3/20

[RevyBreeze]

User Jwlaughton
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