WAEC 2022 Mathematics · Question 2
Three boys shared D 10,500.00 in the ratio 6:7:8. Find the largest share.
Options
- A.4000
- B.5000
- C.4500
- D.3500
Answer: A. 4000
Explanation written with AI and checked against the answer key
Analyze the question: An amount of D 10,500 is shared among three boys in the ratio 6:7:8. We need the largest share, which belongs to the boy with ratio 8.
Concept: To share an amount in a ratio, add the ratio parts to get the total number of parts. Then each share = (part ÷ total parts) × total amount.
Solution:
Total parts = 6 + 7 + 8 = 21
Value of one part = 10,500 ÷ 21 = 500
Shares:
- 6 parts = 6 × 500 = 3,000
- 7 parts = 7 × 500 = 3,500
- 8 parts = 8 × 500 = 4,000
Check: 3,000 + 3,500 + 4,000 = 10,500 ✓
The largest share is 8 × 500 = D 4,000.
Tip: In ratio-sharing questions, first find the value of one part (total ÷ sum of ratio). Then multiply by each ratio number. Always add the shares at the end to confirm they equal the original amount. Here, 10,500 ÷ 21 divides neatly, which is a good sign you are on track.
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