Average Aptitude Set 1

1) What is the average of first five multiples of 12?

1. 36
2. 38
3. 40
4. 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?

1. 30
2. 40
3. 50
4. 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.

1. 30
2. 32
3. 34
4. 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.

1. 7 pages
2. 7.5 pages
3. 8 pages
4. 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?

1. 94
2. 92
3. 90
4. 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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