Q3 MATH 10 REVIEW

Brian likes to wear colored shirts. He has 10 shirts in the closet. Three of these are blue, four are in different shades of red, and the rest are of mixed or different colors. What is the probability that he will wear a blue or a red shirt?

• 7/10

• 1/3

• 3/10

• 1/10

The spinner on the right is spun. What is the probability of a spin that results in an even number or a number less than 4?

• 1/2

• 3/5

• 2/3

• 4/5

There are four batteries, and one of them is defective. Two are to be selected at random for use on a particular day. Find the probability that the second battery selected is not defective, given that the first was not defective.

• 1/4

• 1/3

• 1/2

• 2/3

A pipe is selected at random. What is the probability that it has high shock resistance given that it has high scratch resistance?

• 135/132

• 125/137

• 137/150

• 132/150

What is the probability that it has high scratch resistance and high shock resistance?

• 125/150

• 125/137

• 137/150

• 132/150

A bag contains 7 green marbles, 3 yellow marbles and 5 red marbles. You choose two marbles. What is the probability of selecting a green then a red marble?

• 1/10

• 1/9

• 1/8

• 1/6

A bag contains 7 green marbles, 3 yellow marbles and 5 red marbles. You choose two marbles. What is the probability of selecting two yellow marbles?

Answer explanation

2/15

In a box there are 5 red pens, 3 green pens, and 2 blue pens. What is the probability of picking a red pen, replacing it, and then picking a blue pen?

• 1/10

• 1/20

• 1/30

• 1/40

If a student is randomly picked from the class, what is the probability that the student's grade is 95 if it is known that the student is passing the course?

• 1/7

• 5/41

• 5/43

• 1/10

If a student is randomly picked from the passing class, what is the probability that the student's grade is 95 or greater than 85?

• 11/15

• 11/20

• 11/27

• 11/40