1MA0 Higher November 2013 Paper 1 Q19
19 In a supermarket, the probability that John buys fruit is 0.7
In the same supermarket, the probability that John independently buys vegetables is 0.4
Work out the probability that John buys fruit or buys vegetables or buys both. (3)
| Answer | Mark | Notes |
|---|---|---|
| 0.82 | 3 | M1 for \(1 - 0.7\) (= 0.3) or \(1 - 0.4\) (= 0.6) M1 for \(1 -\) ‘0.3’ \(\times\) ‘0.6’ A1 for 0.82 oe OR M1 for \(1 - 0.7\) (= 0.3) or \(1 - 0.4\) (= 0.6) M1 \((0.7 \times 0.4) + (0.7 \times\) ‘0.6’\() + (\)‘0.3’\(\times 0.4)\) A1 for 0.82 oe |