Handling Data 3
2 marks · EasyThe table shows the colours of balls in a box.
| Colour | Number |
|---|---|
| Red | 6 |
| Blue | 3 |
| Green | 1 |
One ball is taken at random from the box. Calculate the probability that the ball is red.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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6/10 or 0.6 (±0.01)
Also accept: 6/10; 0.6; 3/5
Common mistakes: Total not counted as 10
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Marking points
M1 · 1 mark · Finds total number of balls (10)
A1 · 1 mark · Calculates probability as 6/10 or 0.6 (accept fraction or decimal)
Worked solution
Total number of balls: 6 + 3 + 1 = 10.
Probability = number of red balls divided by total = 6/10 = 0.6.