Besed on the Chemical Sucety,there is 09 probabilny hat in the us.. a randomly A

Question

Besed on the Chemical Sucety,there is 09 probabilny hat in the us.. a randomly American are randomly selected callar bill is taintcd with traces nf e. Assume that clRhu da selected. You may use Find the probability of the dolar bils hava ates wrenc ine. the calculatur er Table A-1. if wau use Table A-1. akzse inwicate ths b. rind the yrobahinty that of them have trtxes af cousine. You use the exact v seven calculator or Table A-1. If wou use lable a 1, please indlca:e this Find the probability that at least seven nf ther have traues of rocaine mu to demenstraue that you can use the binnmial

Explanation / Answer

Solution:-

Probability that randomly selected dollar bill have traces of cocaine = 0.9,

Number of trials = 8

a) Probability that all eight dollar bill have traces of cocaine is 0.4304.

n = 8, p = 0.90, x = 8

By applying binomial distribution:-

P(x, n, p) = nCx*px *(1 - p)(n - x)

P(x = 8) = 0.4304

b) Probability that all eight dollar bill have traces of cocaine is 0.3826.

n = 8, p = 0.90, x = 7

By applying binomial distribution:-

P(x, n, p) = nCx*px *(1 - p)(n - x)

P(x = 7) = 0.3826

c) Probability that all eight dollar bill have traces of cocaine is 0.8131.

n = 8, p = 0.90, x = 7

By applying binomial distribution:-

P(x, n, p) = nCx*px *(1 - p)(n - x)

P(x > 7) = 0.8131

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