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

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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