While calculating the average of 15 numbers, student wrote 43 instead

1.	While calculating the average of 15 numbers, student wrote 43 instead of 34 and 13 instead of 31. If the incorrect average was 30. Find the correct average.1. 30.62. 313. 30.54. 31.5
Answer» Correct Answer - Option 1 : 30.6 Given: Total numbers = 15 By mistake, the student wrote 43 instead of 34 and 13 instead of 31. The incorrect average = 30. Concepts used: Average = (Sum of all observations)/(Number of observations) Calculation: Sum of all observations = 30 × 15 = 450 Correct sum of observations = Incorrect sum + Correct number - Incorrect number ⇒ 450 + 34 + 31 – 43 – 13 = 459 Correct average = 459/15 = 30.6 ∴ The correct average is equal to 30.6.

While calculating the average of 15 numbers, student wrote 43 instead of 34 and 13 instead of 31. If the incorrect average was 30. Find the correct average.1. 30.62. 313. 30.54. 31.5

Answer» Correct Answer - Option 1 : 30.6

Given:

Total numbers = 15

By mistake, the student wrote 43 instead of 34 and 13 instead of 31.

The incorrect average = 30.

Concepts used:

Average = (Sum of all observations)/(Number of observations)

Calculation:

Sum of all observations = 30 × 15 = 450

Correct sum of observations = Incorrect sum + Correct number - Incorrect number

⇒ 450 + 34 + 31 – 43 – 13 = 459

Correct average = 459/15 = 30.6

∴ The correct average is equal to 30.6.

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While calculating the average of 15 numbers, student wrote 43 instead of 34 and 13 instead of 31. If the incorrect average was 30. Find the correct average.1. 30.62. 313. 30.54. 31.5

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