Question

The mean score of 12 students in an examination was 52.5. Later on scrutiny, the scores of two students were 800 of which 350 were female. The total number of male workers would be​

Answer 1

the number of males would be 280

mean = sum of obs/ no.of observations

mean = 12

52.5 = sum/ 12

sum= 52.5× 12

sum= 630

number of females is 350 then

males= sum- females

males= 630- 350

males= 280

Answer 2

There are 380 males workers.

Step-by-step explanation:

Since we have given that

Number of students = 12

Mean score = 52.5

So, the sum of all marks would be

$\bar{x}=\dfrac{\sum x}{n}\\\\52.5=\dfrac{\sum x}{12}\\\\52.5\times 12=\sum x\\\\630=\sum x$

Sum of scores of females = 630

Sum of scores of males would be

$630-350\\\\=380$

Hence, there are 380 males workers.

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The mean score of 12 students in an examination was 52.5 later on scrutiny the score of two students were 800 of which 350 were female the total no. of male workers would be

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