1MA0 Higher November 2014 Paper 2 Q5
5 There are some green counters, some yellow counters, some blue counters and some red counters in a bag.
The table shows the probabilities that a counter taken at random from the bag will be green or yellow or red.
| Colour | Green | Yellow | Blue | Red |
|---|---|---|---|---|
| Probability | 0.16 | 0.4 | 0.24 |
Mary takes at random a counter from the bag.
(a) Work out the probability that the counter will be blue. (2)
Mary puts the counter back into the bag.
There are 125 counters in the bag.
(b) Work out the number of green counters in the bag. (2)
| Answer | Mark | Notes |
|---|---|---|
| 0.2 | 2 | M1 for \(1 - 0.16 - 0.4 - 0.24\) oe A1 cao |
| Answer | Mark | Notes |
|---|---|---|
| 20 | 2 | M1 for \(0.16 \times 125\) oe A1 cao |