It is 9:7 against person A who is now 40 yearsof age living till he is 60 and 3:2 againstperson B now 50 years living till he is 70. Findthe probability that atleast one of them will bealive 20 years hence.

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Answered: It is 9:7 against person A who is now…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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There are 10 candidates for one party’s presidential nomination, including 4 women and 6 men. Suppose that all the men are equally likely to win the nomination, and all the women are equally likely to win the nomination, but that each man is 2 times as likely as each woman to win the nomination. What is the probability that a man wins the nomination?
The probability that a painting job is finished in 2-5 days is 0.55, in 5-8 days is 0.76 and in 2-8 days is 0.90. What is the probability that the job is finished in 2-4 days?
An insurance agent sells the policies to 20 persons having same age and in good health. Based on the company's record, the probability that person in this age will live for the next 20 years is 2/3. Find the probability (a) 8 persons, (b) at most 7 persons, (c) more than 7 persons, (d) at least 3 persons, (e) more than 6 persons but less than 11 persons are still alive at the end of this 20 years period. The probability for a mango tree from a certain type, will produce fruits in the first year is 0.8. Each time, the mango trees seller sells about 5 trees to the buyer with the guarantee that if less than 3 trees produce fruits in the first year, he will replace them according to the number of trees which do not produce fruits. (a) Calculate the probability that there will no replacement. (b) If he sells the trees to 3000 buyers that are 5 trees to each buyer, how many trees are expected to be replaced?
Suppose that Tuon has a perfectly fair coin – that is a coin which lands on heads exactly 50% of the time – and he is not using any tricks. Find the probability that, if he flips it 12 times, he gets at least 10 heads
The probability that a painting job is finished in 1-7 days is 0.30, in 7-10 days is 0.35 and in 1-10 days is 0.45. What is the probability that the job is finished in 1-6 days?
The probability that a painting job is finished in 3-7 days is 0.60, in 7-9 days is 0.55 and in 3-9 days is 0.90 What is the probability that the job is finished in 3-6 days?
Suppose that, on average, the number of car accidents in US are 6 per day (which has 24 hours). i. Determine the probability that at least 4 accidents will occur in 12 hour period. ii. In a two days, if there were 8 car accidents in US, what is the probability that 2 accidents have occurred in the first 12 hours of the two days?

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It is 9:7 against person A who is now 40 years of age living till he is 60 and 3:2 against person B now 50 years living till he is 70. Find the probability that atleast one of them will be alive 20 years hence.