The average marks of a student in seven subjects were 75. His average

1.	The average marks of a student in seven subjects were 75. His average marks in six subjects, excluding Science, was 73. How many marks did he score in Science?1. 872. 823. 834. 845. None of these
Answer» 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.

The average marks of a student in seven subjects were 75. His average marks in six subjects, excluding Science, was 73. How many marks did he score in Science?1. 872. 823. 834. 845. None of these

Answer» 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.

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