Intermediate June 2024 Unit 2 Q6
6. A children’s play area contains a large number of coloured balls.
Some are yellow, some are red, some are blue and the others are pink.
(a) A ball is chosen at random from the play area.
Complete the table below to find the probability of choosing a pink ball. [2]
Complete the table below to find the probability of choosing a pink ball. [2]
| Colour | Yellow | Red | Blue | Pink |
|---|---|---|---|---|
| Probability | 0·54 | 0·12 | 0·25 |
(b) There are 575 blue balls in the play area.
What is the total number of balls in the play area? [2]
What is the total number of balls in the play area? [2]
| Scheme | Marks | Comments |
|---|---|---|
| Answer in table takes precedence. | ||
| 1 – (0·54 + 0·12 + 0·25) or equivalent | M1 | Award M1 for complete method. Note: 1 – 0·91 |
| = 0·09 or equivalent | A1 | Mark final answer. An unsupported answer of 0·09 or equivalent is awarded M1A1. |
| Scheme | Marks | Comments |
|---|---|---|
| 2300 (balls) | B2 | Mark final answer. Award B1 for one of the following:
|