A crate contains only apples, pears, bananas and kiwis.
A piece of fruit is taken at random from the crate.
The table shows the probabilities that the fruit will be a banana or will be a kiwi.
| Fruit | Apple | Pear | Banana | Kiwi |
|---|---|---|---|---|
| Probability | 0.30 | 0.10 |
The probability that the fruit will be an apple is four times the probability that it will be a pear.
There are 15 bananas in the crate.
Work out the number of apples in the crate.
