Question

The mean height of 25 male workers in a factory is 61 cm, and the mean height of 35 female workers in the same factory is 58 cm. The combined mean height of 60 workers in the factory is

• A. 59.25
• B. 59.5
• C. 59.75
• D. 58.75

Answer 1

Answer: (A)

59.25

The mean height of $25$ male workers in factory is $61cm$

$\therefore$ Total height of $25$ male worker $=25\times 61=1525cm$

The mean height of $35$ female workers in factory is $58cm$

$\therefore$ Total height of $25$ female worker $=35\times 58=2030cm$

$\Rightarrow$ Total height of $60$ workers $=1525+2030=3555cm$

$\Rightarrow$ Required mean $=\frac{3555}{60}=59.25cm$