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JAMB Mathematics 2024 Paper

Question : 30

Total: 50

Solution:

Concept:

The average age of a group is the total sum of ages divided by the total number of people.

Explanation:

Total ages of the four female teachers:

4 \times 40 = 160

Total ages of the eight male teachers:

8 \times 25 = 200

Total ages of all twelve teachers:

160 + 200 = 360

Total number of teachers:

4 + 8 = 12

Average age of all teachers:

\frac{360}{12} = 30

Answer:

30

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