GCSE Secondary Maths Age 13-17 - Probability & Statistics: Probability - Explained

The video tutorial explains the concept of a fair 4-sided spinner, emphasizing that 'fair' means each outcome has an equal chance. It guides viewers through marking probabilities on a scale, first for landing on 'B' with a probability of 1/2, and then for 'F', which is not on the spinner, resulting in a probability of 0. The tutorial highlights the importance of understanding probability scales and careful reading of questions.

What does it mean for a spinner to be 'fair'?

• It has more sections labeled 'A'.

• It has an equal chance of landing on any section.

• It has fewer sections labeled 'B'.

• It is biased towards one section.

If a spinner has two sections labeled 'B' out of four, what is the probability of landing on 'B'?

• 1

• 1/2

• 1/4

• 3/4

Where should you mark the probability of landing on 'B' on a probability scale?

• At 0

• At 1/2

• At 1

• At 1/4

What is the probability of landing on a section labeled 'F' if it doesn't exist on the spinner?

• 0

• 1/2

• 1

• 1/4

How should you represent a zero probability on a probability scale?

• At 1/4

• At 0

• At 1/2

• At 1