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Only 3% of people have Type AB blood. If a bloodmobile receives blood from 155 donors,...

Only 3% of people have Type AB blood. If a bloodmobile receives blood from 155 donors, What is the probability that they received 8 or more donations of type AB blood?

Select one:

a. 90.4%

b. 5.1%

c. 9.0%

d. 9.6%

e. 4.5%

math   Statistics-And-Probability   
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Answer #1

By using excel,

P(X 8 ) = 1 - P(X < 7 )

=1- BINOM.DIST(7,155,0.03,TRUE)

= 1 - 0.9037

= 0.096

Probability = 9.6%

Option d is correct.

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