Test: 16 plts possible Question Help * Forty-five percent of households say they
ID: 3372066 • Letter: T
Question
Test: 16 plts possible Question Help * Forty-five percent of households say they would feel secure if they had 550.000 in savings. You randomly select 8 households and ask them if they would feel secure if they had 550.000 in savings. Find the probability that the number that say they would feel secure is (a) exactly five, (b) more than five, and (c) at most five. (a) Find the probability that the number that say they would feel secure is exactly five. P(5)- (Round to three decimal places as needed.) (b) Find the probability that the number that say they would feel secure is more than ive. P(x> 5)- (Round to three decimal places as needed.) (c) Find the probability that the number that say they would feel secure is at most five. (Round to three decimal places as needed.)Explanation / Answer
solution:-
given that p = 0.45 , n = 8
(a) p(x = 5) = 0.172
(b) p(x > 5) = 0.088
(c) p(x ? 5) = 0.912
by formula
p(X = x) = ncr * pr * qn-r