Average Aptitude Set 1
1) What is the average of first five multiples of 12?
- 36
- 38
- 40
- 42
The correct answer is A
Explanation:
Average = 12∗(1+2+3+4+5) ∗ 
= 12 ∗ 15∗ 
= 12 ∗ 3= 36
2) Average of five numbers is 20. If each number is multiplied by 2, what will be the new average?
- 30
- 40
- 50
- 60
The correct answer is B
Explanation:
The new average = Initial average ∗ 2
= 20 ∗ 2 = 40
3) If the average of three consecutive even numbers is 34, find the largest of these numbers.
- 30
- 32
- 34
- 36
The correct answer is D
Explanation:
Let the first number is X, then the next two even numbers would be X+2, X+4
As per question;
= 34
= 34
3X + 6 = 102
3X = 96
X = 32
Largest number would be = 32 + 4 = 36
4) 10 typists can type 600 pages in 8 hours.Find the average number of pages typed by each typist in an hour.
- 7 pages
- 7.5 pages
- 8 pages
- 8.5 pages
The correct answer is B
Explanation:
Total pages typed by 10 typists in 8 hours = 600
Pages typed by one typist in 8 hours = 
= 60 pages
Pages typed by one typist in one hour = 
= 7.5 pages
5) The average of Sohan’s marks in 6 subjects is 74. If his average in five subjects excluding science is 70, how many marks he obtained in science?
- 94
- 92
- 90
- 88
The correct answer is A
Explanation:
Total marks obtained in 6 subjects = 6 ∗ 74 = 444
Total marks in 5 subjects excluding science = 5 ∗ 70 = 350
Therefore, marks obtained in science would be = 444 – 350 = 94
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