The table above shows the number of pupils in each age group in…
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|Age in years||10||11||12|
|No. of pupil||6||27||7|
The table above 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?
- A. 17/20
- B. 17/20
- C. 17/20
- D. 17/20
The term ‘at least 11 years old’ would mean from 11 years and above.
Hence, the number of pupils that is at least 11 years old = 27 + 7 = 34
The total number of pupils = 6 + 27 + 7 = 40
Hence, the probability that the pupil randomly chosen will be at least 11 years is = 34/40 = 17/20
Now for the right answer to the above question:
- Option A is correct.
- Option B is incorrect.
- C is incorrect.
- D is not the correct answer.
You may please note these/this:
- Probability is the number of required outcomes divided by number of possible outcomes.
- “At least 11” simply means 11 and above.
Use the questions and answers session to deal further on this topic…
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/ culled from 2018 JAMB-UTME mathematics question 28 /