Year 8 Probability Diagnostic Test

If a die is rolled once the probability of rolling a six is:

• ^1/3

• 5/6

• 1/6

• 1/2

There were 1000 babies born at the Royal Women’s Hospital in 2003. If 540 babies were boys the probability that a baby born at the Royal Women’s Hospital in 2003 will be a girl is:

• 0.54

• 0.46

• 0.1

• 0.5

The weather report says there will be a 70% chance of rain tomorrow. The probability it will not rain tomorrow is:

• 0.3

• 0.5

• 0.2

• 0.7

A bag contains 14 red balls, 6 blue balls and 5 white balls. The probability that the ball chosen is coloured red is:

• 0.24

• 0.56

• 0.5

• 0.14

A letter is chosen at random from the word “TELEVISION”. The probability that the letter chosen is a vowel is:

• 0.2

• 0.1

• 0.5

• 0.6

A drawer contains 5 blue scarves, 2 red scarves and 3 green scarves. If a scarf is selected at random from the drawer the probability that a green scarf was not selected is:

• 0.3

• 0.5

• 0.7

• 0.03

On a roulette wheel there are 18 even numbers, 18 odd numbers and one zero number. On a random spin the probability of an even number not occurring is:

• 1/37

• 19/37

• 1/18

• 19/36

If an event has a probability of 0.2 of occurring then its complement must have a probability of:

• 0.4

• 0.8

• 0.5

• 0.6

The probability of selecting a blue ball from a box is

3/4. The probability of selecting any other colour is:

• 3/4

• 1/2

• 1

• 1/4

In a raffle there are 100 tickets numbered 1 to 100. If Lina buys the tickets numbered 46, 72 and 89 her probability of winning is:

• 2.06

• 0.03

• 0.3

• 0.97