Multiple choice

The average salary of factory A of 21 labourers is Rs. 5520 and that of factory B of 24 labourers is Rs. 6530. Find the combined average salary of labourers of both the factories.

  1. Rs. 6050.60

  2. Rs. 6058.67

  3. Rs. 5058.67

  4. Rs. 6100.67

  5. Rs. 6120.60
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Number of labourers of factory A (m) = 21

Number of labourers of factory B (N) = 24

Average salary of labourers of factory A (a) = Rs. 5520 

And average salary of labourers of factory B (b) = Rs. 6530 

Now, to find the average salary of labourers of both the factories, use this shortcut formula:

Average salary of labourers of both the factories = (ma + na)/(m + n)

= (5520 * 21 + 6530 * 21)/(21 + 24)

= 6058.67

So, the average salary of labourers of both the factories is Rs. 6058.67.

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