Average Aptitude Set 3

11) What is the average of first five natural numbers?

1. 5
2. 2
3. 3
4. 4

Answer: C

Explanation:

Sum of first five natural numbers =1+2+3+4+5 = 15
Number of quantities = 5
On putting these values in formula:
Average = 15/5
= 3

12) If the sum is 240 and average is 40, find the number of quantities.

1. 5
2. 8
3. 5
4. 6

Answer: D

Explanation:

So, Number of Quantities =240/40
=6

13) A group consists of two male, two female and three children. The average age of the male is 67 years, that of the female is 35 years, and that of the children is six years. What is the average age of the group?

1. 30.71
2. 31.71
3. 28.71
4. 35.45

Answer: B

Explanation:
Average = (67*2+35*2+6*3) /7
= (134+70+18) /7
= 222 /7
= 31.71

14) Mohan gets a salary of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 months. How much salary he must have in the sixth month so that he gets an average of Rs. 6500?

1. 4091
2. 4991
3. 3499
4. 3344

Answer: B

Explanation:
Total salary for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.
Required salary = Rs. [ (6500 x 6) – 34009 ] = Rs. (39000 – 34009)
= Rs. 4991

15) If the average of 20 numbers is zero, how many numbers may be greater than zero?

1. 19
2. 49
3. 17
4. 33

Answer: A

Explanation:
Average of 20 numbers = 0.
Sum of 20 numbers = (0 x 20) = 0.
So, it is quite possible that 19 of these numbers may be positive and if their sum is “X” then 20th number will be (-X).

Read More

Average Aptitude Set 1

Average Aptitude Set 2

Average Aptitude Set 3

Average Aptitude Set 4

Average Aptitude Set 5

Average Aptitude Set 6

Average Aptitude Set 7

Average Aptitude Set 8

Average Aptitude Concepts

Related posts

• Average Aptitude Set 7 (0)
• Average Aptitude Set 6 (0)
• Average Aptitude Set 5 (0)
• Average Aptitude Set 2 (0)
• Average Aptitude Set 1 (0)