Correct Answer - Option 1 : 87
Given:
Average marks of a student in 7 subjects = 75
Average marks in 6 subjects excluding Science = 73
Formula used:
Average = Sum of values/number of values
Calculation:
The average marks of a student in seven subjects = 75
The sum of marks of a student in seven subjects = 75 × 7
⇒ 525
The average marks in six subjects, excluding Science = 73
The sum of marks of a student in seven subjects = 73 × 6
⇒ 438
Science scored in Science = The sum of marks in seven subjects - the sum of marks without Science
Marks scored in Science = 525 - 438
⇒ 87
∴ Marks scored in Science is 87.
