QuestionJAMBGeneral Maths1994ObjectiveProbabilityProbability
The table shows the number of pupils in each age group in a class. What is the probability that a pupil chosen at random is at least 11 years old?
| Age in years |
10 |
11 |
12 |
| Number of pupils |
6 |
27 |
7 |
Worked solution (try it first)
There are
6+27+7=40 pupils.
At least 11 means 11 or 12:
27+7=34 pupils.
So the probability is
4034=2017, option B.
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