Foundation June 2019 Paper 2R Q21
21 There are some ice lollies in a freezer.
The flavour of each ice lolly is banana or strawberry or mint or chocolate.
Julius takes at random an ice lolly from the freezer.
The table shows the probabilities that the flavour of the ice lolly that Julius takes is banana or strawberry or chocolate.
| Flavour | banana | strawberry | mint | chocolate |
|---|---|---|---|---|
| Probability | 0.35 | 0.32 | 0.12 |
Work out the probability that the flavour of the ice lolly that Julius takes is either strawberry or mint.
(3)
| Scheme | Marks |
|---|---|
| P(mint =) 1 – (0.35 + 0.32 + 0.12) (= 0.21) | M1 |
| P(strawberry or mint =) 0.32 + “0.21” | M1 |
| 0.53 oe | A1 |
| (3) | |
| (3 marks) |
Notes
M1: Or a correct equation summing to 1
M1: Dep
A1: Allow 0.53/1