10 years ago, the average age of a family of 4 members was 24 years. Two children having been born (with age difference of 2 years), the present average age of the family is again 24 years. Then the present age of the youngest child is:
1 years
2 years
3 years
4 years
Quiz Recommendation System API Link - https://fresherbell-quiz-api.herokuapp.com/fresherbell_quiz_api
# | Quiz |
---|---|
1
Discuss
|
Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers.
Solution |
2
Discuss
|
Four years ago, the average age of a family of four persons was 18 years. During this period, a baby was born. Today if the average age of the family is still 18 years, the age of the baby is
Solution |
3
Discuss
|
A batsman makes a score of 270 runs in the 87th inning and thus increase his average by a certain number of runs that is a whole number. Find the possible values of the new average.
Solution |
4
Discuss
|
The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then-
Solution |
5
Discuss
|
If the mean of a,b,c is M and ab+bc+ca=0, then the mean of a2,b2,c2 is:
Solution |
6
Discuss
|
The average (arithmetic mean) of 330, 360 and 390 is :
Solution |
7
Discuss
|
The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a one-year old child. The average age of the family of three, when the child was born, was-
Solution |
8
Discuss
|
The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age of the two groups mixed together is :
Solution |
9
Discuss
|
Find the average of all prime numbers between 30 and 50.
Solution |
10
Discuss
|
If 25a + 25b = 115, what is the average of a and b?
Solution |
# | Quiz |
Copyright © 2020 Inovatik - All rights reserved