A bag contains counters of four different colours: purple, orange, white and black. The table shows the probabilities of picking a purple counter and a white counter at random.
| Colour | Purple | Orange | White | Black |
|---|---|---|---|---|
| Probability | 0.15 | 0.45 |
The probability of picking an orange counter is equal to the probability of picking a black counter.
Complete the table to show the probabilities of picking an orange counter and a black counter.
Practise OCR GCSE Maths Probability with exam-style questions for Foundation and Higher tier. 100 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.