Question #190710

If is estimated that 30% of all students who fall under the Business Economics and Management department at Richfield have drivers licence. What is the probability of this in a sample of 10 students


Exactly 4 students have drivers license


1
Expert's answer
2021-05-11T03:55:08-0400

n=10,p=0.3,q=10.3=0.7n=10, p=0.3,q=1-0.3=0.7


Probability Exactly 4 students have driver license


=10C4p4q104=10C4(0.3)4(0.7)6=0.20=^{10}C_4p^4q^{10-4}\\ =^{10}C_4(0.3)^4(0.7)^6=0.20


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