Asked by Emily
Assume that a researcher randomly selects 14 newborn babies and count the number of girls, X. The probabilities corresponding to the 14 possible values of X are summarized in the given table. Answer the questions using the table. Find the probability of selecting exactly 3 girls.
A. 0.022
B. 0.122
C. 0.001
D. 0.061
A. 0.022
B. 0.122
C. 0.001
D. 0.061
Answers
Answered by
mathhelper
No idea what "tables" you are talking about, don't need any
prob(girl) = 1/2
prob(not a girl) = 1-1/2 =1/2
prob(exactly 3 girls in 14)
= C(14,3) (1/2)^3 (1/2)^11
= 364(1/2)^14 = appr. .0222
prob(girl) = 1/2
prob(not a girl) = 1-1/2 =1/2
prob(exactly 3 girls in 14)
= C(14,3) (1/2)^3 (1/2)^11
= 364(1/2)^14 = appr. .0222
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