In a factory , there are 39 workers who have been categorised into five groups ( A, B, C ,E ) on the basis of the range of theis daily wages (in multiples of Rs 100). It Is ensured that the daily wage of no worker in an exact multiple of Rs 100 . The distribution is presented through the given histogram.
If two Manager are engaged to supervise the workers , with daily wages ranging between Rs 700 and Rs 800 , then waht will be the average daily wage (nearest to a Rs ) Of all members of staff of the factory?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Rs 455
Calculations :
Total members in the factory = 39 workers + 2 managers
Daily wages of the managers ranges between 700 and 800, mean is 750.
Calculations done on the basis of midpoints.
Total daily wages of all the members of staff of the factory
⇒ 250 × 5 + 350 × 9 + 450 × 12 + 550 × 11 + 650 × 2 + 750 × 2
⇒ Rs 18650
Total number of workers = 5 + 9 + 12 + 11 + 2 + 2
⇒ 41
Average daily wage of all members of staff of the factory
⇒ 18650/41
⇒ 454.8 = Rs 455