GCSE Revision 1

Probability adds to...

• 1

• 100

• 0

• 5

What is the probability of rain and being late?

• 1.2

• 0.12

• 0.4

• 0.6

Answer explanation

On a tree diagram multiply across the branches

Calculate 0.5 x 0.6

• 0.3

• 3

• 30

• 0.03

Calculate 0.2 x 0.5

• 1

• 10

• 0.01

• 0.1

What is the y-intercept?

• 1

• -4

• 4

• 2

Answer explanation

Remember the y-intercept is where the line crosses the y-axis (the vertical one)

Answer explanation

How many of the bottom go into the top?

That is your big number

The remainder goes back over the fraction

Answer explanation

How many bottoms go into the top?

This is your big number

The remainder goes back over the fraction

Answer explanation

Multiply the numbers

Write the letters next to each other

Answer explanation

Multiply the numbers

Write the letters next to each other

• 6

• 11

• 7

• 2

Answer explanation

Mean = sum of numbers / how many