Foundation November 2018 Paper 1 Q24
24 Romelu picks a shirt and shorts.
The probability he picks a red shirt is 0.4.
The probability he picks white shorts is 0.7.
(a) Complete the tree diagram.
[3]
(b) Calculate the probability that Romelu picks a red shirt but does not pick white shorts. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 0.6 | 1 | Alternative answer 0.7, 0.3, 0.3, 0.7 (White), not white, not white, white | |
| 0.7, 0.3, 0.7, 0.3 | 1 | ||
| (White), not white, white, not white | 1 | ||
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| [0].12 | 2 | Correct or ft their 0.3 M1 for 0.4 \(\times\) 0.3 ft their 0.3 | isw incorrect conversions after 0.12 |