Handling Data 4

1 mark · Easy

In an experiment, a bag contains only red and blue counters. Out of 40 counters, 18 are red. A counter is picked at random. Describe, in one sentence, the chance of picking a blue counter.

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More likely not to pick blue than to pick blue, since there are fewer blue counters (22 out of 40).

Also accept: It is more likely to pick red than blue.; The chance is less than half for blue.

Common mistakes: Confusing the quantities of each colour

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Marking points

B1 · 1 mark · Gives a correct statement comparing chances (e.g., less likely to pick blue than red)

Worked solution

There are 22 blue out of 40, so picking blue is more likely than not picking blue.