A jar contains only black beads, gold beads, and silver beads. A bead is selected at random. The table shows the probability of selecting a black bead.
| Bead | Black | Gold | Silver |
|---|---|---|---|
| Probability | 0.1 |
The probability of selecting a gold bead is equal to the probability of selecting a silver bead.
Complete the table.
There are 15 black beads in the jar. Work out the total number of beads in the jar.
Practise OCR GCSE Maths Probability with exam-style questions for Foundation and Higher tier. 212 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.
