1MA0 Higher June 2012 Paper 1 Q19
19 Wendy goes to a fun fair.
She has one go at Hoopla.
She has one go on the Coconut shy.
The probability that she wins at Hoopla is 0.4
The probability that she wins on the Coconut shy is 0.3
(a) Complete the probability tree diagram.
(b) Work out the probability that Wendy wins at Hoopla and also wins on the Coconut shy. (2)
| Answer | Mark | Notes |
|---|---|---|
| 0.6 0.7, 0.3, 0.7 | 2 | B1 for 0.6 in correct position on tree diagram B1 for 0.7, 0.3, 0.7 in correct positions on tree diagram |
| Working | Answer | Mark | Notes |
|---|---|---|---|
| 0.4 × 0.3 = | 0.12 | 2 | M1 for 0.4 × 0.3 oe or a complete alternative method ft from tree diagram A1 for 0.12 oe |