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# 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**

**QUICK ANSWER…**

**A**

**SOLUTION****… **** **

**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.**

**QUICK TIPS…**

**You may please note the****se/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 /**