The average salary/head of allthe workers in a workshop is Rs.750, if the average salary/head of 5 technician is Rs.900 and the average salary/head of the rest is Rs.700, the total no. of workers in the work-shop is ?	Choose the correct choice
A) 18  B) 20  C) 22  D) 24  E) 26
Let the total number of workers be y.
So sum of salary for all workers = sum of salary of 5 technician + sum of salary for other y -5 workers.
5 x 900 + 700(y -5) = 750 y
⇒ 4500 + 700y - 3500 = 750y
⇒ 50y = 1000
∴ y = 20 So total number of workers = 20
20
<result>B</result>
The average salary/head of allthe workers in a workshop is Rs.750, if the average salary/head of 5 technician is Rs.900 and the average salary/head of the rest is Rs.700, the total no. of workers in the work-shop is ?