The average marks of a student in seven subjects was 75. His average marks in six subjects, excluding Maths, was 73. How many marks did he score in Maths ?
1. 81
2. 84
3. 87
4. 91
5. None of these
Answers
Answered by
3
answer is 87..
because 75×7 - 73×6
=525-438
=87...
Answered by
0
Option C is the correct answer.
The total marks scored by the student in mathematics are 87.
Given:
The average marks scored by the student in seven subjects = 75
The average marks in six subjects = 73
To find:
Total marks scored by the student in Mathematics.
Solution:
We know that,
Average = Total marks of the student/ Number of subjects
Total marks in 7 subjects= 75 × 7 = 525
Total marks in 6 subjects = 73 × 6 = 438
Marks scored by the student in mathematics = Total marks in 7 subjects – total marks in 6 subjects
= 525- 438
= 87
Therefore, total marks scored by the student in mathematics = 87
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