Based on past experience, 1 % of the telephone bills mailed to house-holds in hong kong are incorrect. if a sample of 10 bills is selected, find the probability that at least one bill will be incorrect. do this using two probability distributions (the binomial and the poisson) and briefly compare and explain your results.

Given : The probability that telephone bills mailed to house-holds in Hong Kong are incorrect.=0.01

If a sample of 10 bills is selected, then the probability that at least one bill will be incorrect :-

Hence, the probability that at least one bill will be incorrect =0.6513

Mean :

Then , If a sample of 10 bills is selected, then the probability that at least one bill will be incorrect :-

Hence, the probability that at least one bill will be incorrect =0.6321

18a

step-by-step explanation:

simply because it is. it's the highest common factor

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: