PROBABILITY IGCSE

What is the probability that the sun will rise tomorrow?

• Likely

• Unlikely

• Impossible

• Certain

The numbers 1 to 20 are each written on a card. The 20 cards are mixed together. Find the probability that the number on the the card is a factor of 24

• 1/20

• 5/20

• 1/2

• 7/20

The numbers 1 to 20 are each written on a card. The 20 cards are mixed together. Find the probability that the number on the the card prime

• 2/5

• 3/5

• 5/7

• 3/7

A fair die is thrown once. Find the probability of obtaining an odd number

• 1/3

• 1/2

• 3/5

• 1/6

a fair coin is tossed and a fair die is rolled. Find the probability of obtaining a 'head' and a 'six'

• 1/2 x 1/6 = 1/12

• 1/2 + 1/6 = 4/6

• 1/8

• 1/7

A bag contains 8 red marbles, 4 blue marbles and 2 yellow marbles. What is the probability of randomly taking a yellow marble out of the bag?

• 1/6

• 1/7

• 1/2

• 2/13

What is the probability of rolling an even number on a dice?

• 1/3

• 2/3

• 1/2

• 1/6

The probability of rolling a prime number on a dice is:

• 1/3

• 2/3

• 1/2

• 1/6

An unlikely chance event is closer to what number?

• 0

• 1

• 0.5

• 100

The probability of it raining today is 30%. What is the probability that it will NOT rain?

• 30%

• 70%

• 100&

• 0%