Question
Edexcel Paper 1F (non-calculator)
A spinner has four colours. The probabilities are:
| Colour | Red | Blue | Green | Yellow |
|---|---|---|---|---|
| Probability | 0.3 | 0.25 | 0.2 | x |
(a) Find x. (2 marks) (b) Find P(blue or yellow). (2 marks)
4 marks · take your time before peeking.
Sign up to try the next 30 problems
Save your streak, mark answers against the spec, and build a daily revision habit. Free during public beta — no card, no auto-renew.
Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.