Math

posted by .

In a recent year there were the following numbers (in thousands) of licensed drivers in the United States.

MALE:
Age 19 and under - 4746
Age 20 - 1625
Age 21 - 1679

FEMALE:
Age 19 and under - 4517
Age 20 - 1553
Age 21 - 1627

Choose one driver at random. Find the probability that the driver is:
a. Male and 19 or under
b. Age 20 or female
c. At least 20 years old.

• Math -

A. 4746/(grand total) = ?

Grand total is the sum of all the observations.

B. Either-or probabilities are found by adding the individual probabilities.

(All age 20/grand total) + (all female/grand total) = ?

C. (all 20+)/(grand total) = ?

Similar Questions

1. Math

Sheila's age is two years more than twice Nicole's age. The sum of their ages is the same as Steven's age. If Steven's age is ten years less than five times Nicole's age, ,find the age of each. Write a verbal model!
2. statistics

I am having trouble knowing if I add or multiply with this problem: Male Female Age 19 and under 4746 4517 Age 20 1625 1553 Age 21 1679 1627 Choose one driver at random. Find the probability that the driver is Male and 19 or under. …
3. probability and statistics

the average age for licensed drivers in the country is u=40.3 years with a standard deviation of o= 13.2 years. a. a researcher obtained a random sample of n=16 parking tickets and computed an average age of m=38.9 years for the drivers. …
4. statistics

The average age for licensed drivers in the county is μ  40.3 years with a standard deviation of   13.2 years. a. A researcher obtained a random sample of n  16 parking tickets and computed an average age of M  38.9 years …
5. Math

Ricky wrote the following to show that his sister's age is 6 yrs. less than 3 times his age. Explain what he did wrong. Give the correct expression Let a stand for my age My sister's age a/3-6
6. statistics

Suppose that two employees have to be fired from a group of seven: • Amy, female, age 35 • Bob, male, age 41 • Chad, male, age 43 • Diana, female, age 44 • Elvis, male, age 49 • Frank, male, age 61 • Ginger, female, age …
7. statistics

The average age for licensed drivers in a county is µ= 42.6, σ= 12 and the distribution is approximately normal. A county police officer was interested in whether the average age of those receiving parking tickets in the county …
8. Math

Freddy and Frankie want to know their grandmother's age. She tells them that the digits of their age make up her age. She also tells them that their age plus her age total 83. What is the age of the grandmother?
9. algebra

the sum of the age of a girl and her brother is 26 year 3 years ago her age was 4 time the age of her brother. find their present age?
10. math - age problem

3 years ago, Vin’s age is 3 times the age of Paul. At the present, Vin’s age is twice the age of Paul. What would be their age 3 years from now if the sum of their present age is 18?

More Similar Questions