An automobie service facility specializing in en ne tune-ups knons hat 50% er an

Question

An automobie service facility specializing in en ne tune-ups knons hat 50% er an tune ups are done on four cy nder anomosiles sos bn si-on der automotres snd 20% on at t ene ar sutom met of cylinders on the ta) what is the pmf or X7 pca) (b) Drew & Ine graph for the pnt of part (a), 4 S67of clioders 03 0.1 45 67efcytinderso 4 56 7of cyfinders Drawprobability histogram for the pmr of part (a). Probabliny 0.3 0.2 0.1 8 of cytinderso 4 of clinders Probablity 0.3 03 02 Number of cylinders of cylinders c) What is the probability that the next car tuned has at least sik cyinders? What is the probability that the next car tuned has more than six cyinders? e

Explanation / Answer

a)

b)

pmf

first graph top left most graph is correct

histogram

2nd one ; top right most graph is right

c) probability of having at least six cylinder =P(X=6)+P(X=8) =0.3+0.2=0.50

probability of more then 6 cylinder =P(X=8)=0.20

x 4 6 8 P(x) 0.5 0.3 0.2

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