1.

A school conducts 7 terminal exams. Average marks scored by a student in first 3 terminal exams is 50 and average marks scored by a students in rest of the terminal exam is 85.Find the average of all exams.1. 802. 703. 604. 50

Answer» Correct Answer - Option 2 : 70

Given:

Average of first 3 terminal exams = 50

Average of last 4 exams = 140

Formula used:

Average = Sum of all observation/Number of observation

Calculation:

Sum of the marks of first 3 terminal exam = 3 × 50 = 150

Sum of the marks of last 4 terminal exam = 4 × 85 = 340

Total marks in 7 exams = 490

Average marks = 490/7 = 70



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