4MA1/1FR Jun 2019, Question 21: Mean, Median, Mode and Range
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1FR (Foundation) · Calculator · 3 marks
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The question, in short
Given 10 people with mean weight 79.2 kg and 3 leaving with mean weight 68 kg, calculate the mean weight of the remaining 7 people.
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Solution · 3 marks
- 110 × 79.2 = 792
- 23 × 68 = 204
- 3(792 − 204) ÷ 7 = 588 ÷ 7
- 4588 ÷ 7 = 84
Answer84
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