AP EAMCET · Maths · Statistics
The mean marks of 25 boys in a class is 61 and the mean marks of 35 girls in the same class is 58 . Then, the mean of all 60 students is
- A 56.25
- B 59.25
- C 57.25
- D 63.25
Answer & Solution
Correct Answer
(B) 59.25
Step-by-step Solution
Detailed explanation
Number of boys \(=25\) Mean marks of boys \(=61\) Number of girls \(=35\) Mean marks of girls \(=58\) Total mean of all 60 students \(=\frac{61 \times 25+35 \times 58}{60}\) \[ =\frac{1525+2030}{60}=\frac{3555}{60}=59.25 \]
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