Question

The average number of bulbs produced by a company per day in a week is 500, if the company increased its per day production by 15%, Find the new average?
1. 650
2. 585
3. 456
4. 575
5. 525

Answer 1

Correct Answer - Option 4 : 575

Given∶

average number of bulbs produced by a company per day in a week is 500

Calculations∶

Let the number of bulbs produced by the company on 7 days of weeks is a₁ + a₂ + a₃ + a₄ + a₅ + a₆ + a₇ respectively.

Average of bulbs produced in the whole week = (a₁ + a₂ + a₃ + a₄ + a₅ + a₆ + a₇) / 7 = 500

⇒ a₁ + a₂ + a₃ + a₄ + a₅ + a₆ + a₇ = 3500

According to question; per day production is increased by 15% the total number of bulbs is ⇒ 3500 + 15% of 3500

⇒ 3500 + 525

⇒ 4025

New average = 4025 / 7

⇒ 575

Hence the new average is 575.