The average monthly salary of laborers and supervisors in a factory is Rs.1250 per month; where as the average monthly salary of 6 supervisors is Rs.2450. If the average monthly salary of the laborers is Rs.950 find the number of laborers? Choose one:
A) 12
B) 42
C) 66
D) 88
E) 10
5x 6x 2x   50 25 100   250x + 150x + 200x = 4200   600x = 4200   x = 7 =&gt; 6x = 42   Answer: 42
<result>B</result>
The average monthly salary of laborers and supervisors in a factory is Rs.1250 per month; where as the average monthly salary of 6 supervisors is Rs.2450. If the average monthly salary of the laborers is Rs.950 find the number of laborers?