Question 272951: A postal carrier distributes letters, ads, and magazines. The break donw of deliveries is:
Delivered to / Letter / Ads / Magazines
Homes /775 / 880 /270
Business /485 /417 /180
Questions
A What is the probability that it was an ad?
B What is the probability that it was and ad delivered to a home?
C What is the probability that it was an add or it was delivered to a home?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A postal carrier distributes letters, ads, and magazines. The break down of deliveries is:
Delivered to / Letter / Ads / Magazines /Total
Homes /775 / 880 /270 /1925
Business /485 /417 /180 /1082
Total /1260 /1297 /450 /3007
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Questions
A What is the probability that it was an ad? = 1297/3007
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B What is the probability that it was an ad delivered to a home? = 880/3007
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C What is the probability that it was an ad or it was delivered to a home?
= P(ad)+P(home)-P(ad and home) = (1297+1925-880)/3007 = 2342/3007
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Cheers,
Stan H.
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