6. The 22 pupils in a class were asked, “What is your favourite pet?” The pets chosen by the pupils were dog, cat, rabbit and hamster. Some of the results are shown in the bar chart below.
9 pupils in the class chose either rabbit or hamster. The modal pet is rabbit.
(a) Complete the bar chart by drawing the two missing bars. [2]
(b) One of these pupils is chosen at random. What is the probability that this pupil’s favourite pet is a cat? [2]
Mark scheme (a)
Scheme
Marks
Comments
Bars drawn correctly, 8 for rabbit and 1 for hamster.
B2
For B2, bars must be two squares wide. Condone inconsistent gap between bars. B1 for one of the following:
any indication of 8 rabbits and 1 hamster
any indication of 9 rabbits and 0 hamsters (if drawn on bar chart, the 9 must be unambiguous).
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