65% of all students at a college still need to take another math class. If 5 students are randomly selected, find the probability that a. Exactly 2 of them need to take another math class.  b. At most 2 of them need to take another math class.  c. At least 3 of them need to take another math class.  d. Between 2 and 4 (including 2 and 4) of them need to take another math class.

There are 100 balls in a container. 30 of them are red, 50 blue, and 20 green.  We randomly select a ball, return it to the container and select another ball.  What is the probability that both selected  balls are of the same color? Write your answer as a decimal.

A family has 55 children. Assume that each child is as likely to be a boy as it is to be a girl. Find the probability that the family has 55 girls if it is known the family has at least one girl. Answer:

In a group of 78 people; 24 drink tea and 31 drink coffee. Find the probability that a person picked from this group at random is either tea or coffee drinker?

9% of all Americans live in poverty. If 36 Americans are randomly selected, find the probability that a.  Exactly 3 of them live in poverty. b.  At most 3 of them live in poverty. c.  At least 5 of them live in poverty. d.  Between 2 and 10 (including 2 and 10) of them live in poverty.   74% of all Americans live in cities with population greater than 100,000 people. If 49 Americans are randomly selected, find the probability that a. Exactly 35 of them live in cities with population greater than 100,000 people. b. At most 35 of them live in cities with population greater than 100,000 people. c. At least 36 of them live in cities with population greater than 100,000 people. d. Between 29 and 33 (including 29 and 33) of them live in cities with population greater than 100,000 people.   77% of all students at a college still need to take another math class. If 36 students are randomly selected, find the probability that a. Exactly 27 of them need to take another math class. b. At most 27…

The probability that a person in the US has blood type B is 9 %. A sample of five people is selected.   Find the probability that all five have blood type B. Find the probability that none have blood type B. Find the probability that at least one has the blood B.

80% of all students at a college still need to take another math class. If 5 students are randomly selected, find the probability that a. Exactly 2 of them need to take another math class. b. At most 2 of them need to take another math class. c. At least 3 of them need to take another math class. d. Between 2 and 4 (including 2 and 4) of them need to take another math class. Round all answers to 4 decimal places.

An urn contains 10 red marbles, 7 white marbles, and 8 blue marbles marbles. A child randomly selects three (without replacement) from the urn. Round to four decimal places. a. Find the probability all three marbles are the same color. b. Find the probability that none of the three marbles are white.

The average number of field mice per acre in a 6-acre wheat field is estimated to be 13. a. Find the probability that fewer than 7 field mice are found on a given acre; b. Find the probability that fewer than 7 field mice are found on 2 of the next 3 acres inspected;

9% of all Americans live in poverty. If 38 Americans are randomly selected, find the probability thata.  Exactly 4 of them live in poverty. b.  At most 4 of them live in poverty. c.  At least 2 of them live in poverty.