0580 P41 - Jun 2014 - Q6 - 8 marks
15599
A biased spinner has probabilities:
| Score | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Probability | 0.1 | 0.2 | 0.4 | 0.3 |
(a(i)) Find P(2 or 3). [2]
(a(ii)) How many scores of 4 are expected in 5000 spins? [1]
(a(iii)) Find P(1 on the first spin and 4 on the second). [2]
(b) A bag holds 7 red and 5 blue discs. Two are drawn without replacement. Find P(at least one red), as a fraction. [3]
