4MA1/1F Jun 2020, Question 15: Direct Proportion in Real Life
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 4 marks
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The question, in short
Calculate an estimate of how many faulty toy cars are produced daily, given 15-hour production, 5 cars per 12 seconds, and fault probability 0.002.
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Solution · 4 marks
- 1Seconds in a day: 15 × 60 × 60 = 54 000
- 2Number of 12-second blocks: 54 000 ÷ 12 = 4500
- 3Cars made: 4500 × 5 = 22 500
- 4Faulty cars: 22 500 × 0.002 = 45
Answer45
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