Question

This Question: 1pl 7 ct 30 (1 compete) This Test: 30 pts possible o The probability cuntomet of M. Moody's Bookstores a credit card to complete a purchase is Sex What is the probability at last 11 of the road condomers will be a credit card to complete a purchase? (Pound to the nearest Both of a percent) OA 74% OB. 58 Oc 1600 OD 252 O E 412 Type here to 4 3 9 8 7 5 T R Q o Н. K L F G ASD

Answer 1

Let x represent a random variable which denotes the number of customers that will use the credit cards.

Given

p = 0.50

n = 20

We know that,

$P(X=x) = \binom{n}{x}*p^{x}*(1-p)^{n-x}$

The required probability is,

$P(X\geq11) = 1 - P(X=0)+........ +P(X=10)$

P(X211) = 1 – 0.5881

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