4.75 Use the central limit theorem to verify the following results. (a) The probability of getting r or more sixes in one throw of 6r fair dice tends to 1/2 as r.

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Chapter1: Combinatorial Analysis
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Question number 4.75

(a) What is, in Example 3.3, a good approximation for the probability
that the profit of Joe and his brother will be $100 or more after 52
weeks?
(b) What is a good approximation for the probability that more than 80
rolls are required when you roll a fair die until the total sum exceeds
300?
4.74 Let X₁, X2,... be a sequence of independent random variables each
having the same distribution with expected value μ and standard devi-
ation G. Show that P(1/(X₁ + ... + Xn) − µl > c) ~2 [1- (W/M)]
for n large.
DEN
4.75 Use the central limit theorem to verify the following results.
d bamislo 21m
(a) The probability of getting r or more sixes in one throw of 6r fair dice
tends to as r.
2 100 odt blod
OH
(b) e¯”(1 + m + 2 + ... + m) tends to 1/2
2!
as n →∞.
4.76 An insurance company has 20,000 policyholders. The amount claimed
yearly by a policyholder has an expected value of $150 and a standard
deviation of $750. Give an approximation for the probability that the total
amount claimed in the coming year will be larger than 3.3 million dollars.
4.77 In the 52 drawings of the 6/45 lottery in Orange Country last year, an
even
un 163 times and an odd number 150 times. Does
Transcribed Image Text:(a) What is, in Example 3.3, a good approximation for the probability that the profit of Joe and his brother will be $100 or more after 52 weeks? (b) What is a good approximation for the probability that more than 80 rolls are required when you roll a fair die until the total sum exceeds 300? 4.74 Let X₁, X2,... be a sequence of independent random variables each having the same distribution with expected value μ and standard devi- ation G. Show that P(1/(X₁ + ... + Xn) − µl > c) ~2 [1- (W/M)] for n large. DEN 4.75 Use the central limit theorem to verify the following results. d bamislo 21m (a) The probability of getting r or more sixes in one throw of 6r fair dice tends to as r. 2 100 odt blod OH (b) e¯”(1 + m + 2 + ... + m) tends to 1/2 2! as n →∞. 4.76 An insurance company has 20,000 policyholders. The amount claimed yearly by a policyholder has an expected value of $150 and a standard deviation of $750. Give an approximation for the probability that the total amount claimed in the coming year will be larger than 3.3 million dollars. 4.77 In the 52 drawings of the 6/45 lottery in Orange Country last year, an even un 163 times and an odd number 150 times. Does
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