Question
Download Solution PDFThe following table shows the marks of a student in 5 tests in the subjects Maths, Physics, and Chemistry (out of 100 for each subject). Study the table and answer the question that follows.
|
Tests |
Maths |
Physics |
Chemistry |
|
1 |
80 |
69 |
91 |
|
2 |
94 |
79 |
85 |
|
3 |
88 |
81 |
95 |
|
4 |
92 |
76 |
90 |
|
5 |
96 |
90 |
84 |
The ratio of the average marks obtained by the student in test 2 to the average marks he got in Maths in all tests, is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFormula used:
Average = Total marks / number of attempts or subjects
Calculation:
Total marks in test2 = Marks in maths + marks in physics + marks in chemistry
⇒ 94 + 79 + 85
⇒ 258
Average of marks in test2 = 258 / 3
⇒ 86
Total marks in Maths = Marks in maths in test1 + test2 + test3 + test4 + test5
⇒ 80+ 94 + 88 + 92 + 96
⇒ 450
Average of marks in maths = 450 / 5
⇒ 90
Required Ratio = Average of marks in test2 / Average of marks in maths
⇒ 86 / 90
⇒ 43 : 45
∴ The correct answer is 43 : 45.
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