MEDIUM
AS and A Level
IMPORTANT
Earn 100

A set of data values is 8, 13, 17, 18, 24, 32, 34 and 38 . Find the probability that a randomly selected value is more than one standard deviation from the mean.

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Important Questions on Probability

MEDIUM
AS and A Level
IMPORTANT
One student is randomly selected from a school that has 837 boys. The probability that a girl is selected is 47. Find the probability that a particular boy is selected.
EASY
AS and A Level
IMPORTANT

Find the probability that the number rolled with an ordinary fair die is:

a prime number or a 4

EASY
AS and A Level
IMPORTANT

Find the probability that the number rolled with an ordinary fair die is:

a square number or a multiple of 3

EASY
AS and A Level
IMPORTANT

Find the probability that the number rolled with an ordinary fair die is:

more than 3 or a factor of 8 .

EASY
AS and A Level
IMPORTANT

A group of 40 students took a test in Economics. The following Venn diagram shows that 19 boys B took the test and that seven students failed the test F

Question Image

Describe the 21 students who are members of the set B'.

EASY
AS and A Level
IMPORTANT

A group of 40 students took a test in Economics. The following Venn diagram shows that 19 boys B took the test and that seven students failed the test F

Question Image

Find the probability that a randomly selected student is a boy or someone who failed the test.

EASY
AS and A Level
IMPORTANT

The following table gives information about all the animals on a farm.

  Male Female
Goats 5 25
Sheep 3 22

Find the probability that a randomly selected animal is:

male or a goat

EASY
AS and A Level
IMPORTANT

The following table gives information about all the animals on a farm.

  Male Female
Goats 5 25
Sheep 3 22

Find the probability that a randomly selected animal is:

a female or a sheep.