Question 1- (No internet Or website ) Only manually steps explanation for all question

20% of a towns drivers are young (21 or under). The probability of getting a ticket for a young driver is 7% and for an older driver is 3%. You just observed a police officer giving a ticket to someone.

What is the probability that this driver is a young driver?

What is the probability this driver is an older driver?

What is the probability of someone getting a ticket in this town?

A driver has called you on the phone. What is the probability that he / she is a young driver?

Question-2

80% of the people who get infected by a certain bacteria get better without any treatment as the immune system takes care of the bacteria. Those who fall ill are treated by antibiotics by a doctor and 90% of them get better. Those who don't get better need to be hospitalized. 95% of those hospitalized get home within a week. the rest Rest in Peace.

If a person is infected by the bacteria, what are his / her chances of seeing a doctor?

If a person is infected by the bacteria, what are his / her chances of getting admitted in a hospital?

If a person is infected by the bacteria, what are his / her chances of dying?

Question- 3

The Variance of the heights of the mango trees in your garden is 13 sq ft. What will be the variance in yards?

Question -4

There are 20 customers in your restaurant. Probability of someone ordering wine is 25%. How many people you expect to order wine?

Question -5

You've a coin which is not fair. The probability of Heads is 0.52. If you toss it three times, what is the probability that you will get 2 or more Heads?