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Thirty boys and x girls sat for a test. The mean of the boys' scores...

Mathematics
JAMB 1984

Thirty boys and x girls sat for a test. The mean of the boys' scores and that of the girls were respectively 6 and 8. Find x if the total scores was 468

  • A. 38
  • B. 24
  • C. 36
  • D. 22
  • E. 41
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Correct Answer: Option C
Explanation

Number of boy's = 30

Number of girls = x

Mean of boys' score = 6, for girls = 8

Total score for boys = 30 x 6

Total score for both boys and girls = 468

180 + 8x = 468

x = \(\frac{288}{8}\)

= 36


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JAMB CBT Mobile App 2025 - Free Download
JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
JAMB CBT Software 2025 - Free Download
JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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