Probability and Outcomes

A pupil is selected at random from a class of 18 girls and 17 boys. What is the probability that the pupil chosen is a boy?

• 1/7

• 18/35

• 1/2

• 17/35

A bag contains 7 yellow, 6 green, 3 blue, and 8 red marbles. If Jeos gets a ball from the bag, what is the probability that she will not draw a red marble?

• 1/3

• 2/3

• 1/4

• 2/4

A bag contains ten black marbles, twenty white marbles, and five blue marbles. What is the probability of picking a blue marbles?

• 1/7

• 2/7

• 4/7

• 5/7

The spinner is numbered 1, 2, 3, 4, 5, 6. What is the probability that the spinner will land on an even number?

• 2/5

• 1/4

• 1/2

• 2/3

A bag contains 7 yellow, 6 green, 3 blue, and 8 red marbles. If Jeos gets a ball from the bag, what is the probability that she will not draw a yellow marble?

• 17/24

• 7/24

• 1/3

• 1/8

A bag contains 7 yellow, 6 green, 3 blue, and 8 red marbles. If Jeos gets a ball from the bag, what is the probability that she will not draw a green marble?

• 5/6

• 1/4

• 3/4

• 7/24

A spinner numbered 1, 2, 3, 3, 3, 3, 3, 6, 6. What is the probability that the spinner will stop on number 3?

• 2/9

• 5/9

• 1/9

• 1/3

You ask a friend to think of a number from three to ten. What is the probability that his number will be 6?

• 2/8

• 3/8

• 4/8

• 1/8

There are 2 red marbles and 4 blue marbles in a bag. One marble is drawn from the bag at a time.

Describe the likelihood of the outcome: A blue marble will be drawn.

• more likely

• less likely

• equally likely

• certain

• impossible