1.

The average marks of fourteen students were 71. After checking it came to notice that the marks of a student were entered 42 instead of 56 and marks of another student were entered 74 instead of 32, the correct average is:1. 692. 713. 744. 68

Answer» Correct Answer - Option 1 : 69

Given:

Average marks = 71

Total students = 14

Formula used:

Average = Sum of total terms/Total number of the terms

Calculation:

The total marks of the 14 students = 71 × 14 = 994

Total miscalculated marks of the students = 56 – 42 + 32 – 74 = -28

Correct total marks of the 14 students = 994 – 28 = 966

Correct average = 966/14 = 69

∴ The correct average marks is 69



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