NECO 2005 Economics · Question 24

If the population of a school is 600 and 60% are In JSS, how many students are in SSS?

Options

A.204
B.224
C.240
D.244
E.248

Answer: C. 240

Explanation written with AI and checked against the answer key

Analyze the question: The school has 600 students in total. 60% are in JSS. We need the number in SSS.

Concept: This is a percentage problem. If the school has only two sections (JSS and SSS), the percentages must add up to 100%.

Solution:

Percentage in SSS = 100% − 60% = 40%
Number in SSS = 40/100 × 600
= 0.4 × 600 = 240

Check: JSS = 60/100 × 600 = 360. Then 360 + 240 = 600, which matches the total population.

Answer: Option C (240).

Tip: In "percentage of a total" questions, subtract to find the remaining percentage first (100% − 60% = 40%), then calculate. Always check that your parts add back up to the total. This takes only a few seconds and catches careless mistakes.

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