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Lucky penny? Harris Interactive reported that 33%of U.S. adults believe that

finding and picking up a penny is good luck. Assuming that responses from different

individuals are independent, what is the probability of randomly selecting 10U.S. adults

and finding at least 1person who believes that finding and picking up a penny is good

luck?

Short Answer

Expert verified

Probability of randomly selecting 10U.S. adults and finding at least 1person who believes that finding and picking up a penny is good luck is 98.177%

Step by step solution

01

Given information

We have been given that 33%of United States' adults believe in finding and picking up a penny is a sign of good luck.

We need to find out the probability of randomly selecting 10U.S. adults and finding at least 1person who believes that finding and picking up a penny is good luck

02

Explanation

Let A=Adults believe that finding and picking up a penny is good luck.

Let B =At least 1of 10adults believe that finding and picking up a penny is good luck.

Let An=One adult believe that finding and picking up a penny is good luck.

Let Bn =None of the 10adults believe that finding and picking up a penny is good luck.

PA=33%=0.33PAn=1-PA=1-0.33=0.67

Using the multiplication rule for independent events

PBn=PAn10=PAn10=0.67100.01823

Using complement rule

PB=1-PBn=1-0.01823=0.98177=98.177%

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