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Foundation November 2017 Unit 2 Q5

WJECFoundationCurrent spec5 marksBasic Probability

5. In this question, you will be assessed on the quality of your organisation, communication and accuracy in writing.

A class has 32 pupils.
18 are boys.
The others are girls.

12 pupils from this class went on a trip.
One of these 12 pupils is chosen at random.
There is an even chance that the chosen pupil is a girl.

How many girls stayed in class? [3 + 2 OCW]

The number of girls who stayed in class is ……………