If the mean of a,b,c is M and ab+bc+ca=0, then the mean of a2,b2,c2 is:
M2
3M2
6M2
9M2
Quiz Recommendation System API Link - https://fresherbell-quiz-api.herokuapp.com/fresherbell_quiz_api
# | Quiz |
---|---|
1
Discuss
|
One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/h. Find the average speed for the whole journey.
Solution |
2
Discuss
|
If the average of x and 1/x(X\( \ne \)0) is M, then the average of x2 and 1/x2 is :
Solution |
3
Discuss
|
The average age of P, Q and R is 15 years more than R's age. If the total age of P and Q together is 39 years, then R's age is ?
Solution |
4
Discuss
|
Out of 20 boys, 6 are each of 1 m 15 cm height, 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is :
Solution |
5
Discuss
|
An elevator can carry maximum of 16 passengers with an average weight of 80 kg. However, four boys more than the maximum carrying capacity of the elevator entered it making the average weight as 86 kg and overloading the elevator. What is the average weight of those four boys ?
Solution |
6
Discuss
|
The average of four consecutive even numbers is 15. The 2nd highest number is :
Solution |
7
Discuss
|
In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 run is :
Solution |
8
Discuss
|
Find the average of all the numbers between 6 and 34 which are divisible by 5 -
Solution |
9
Discuss
|
In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average of the school is 11 years 9 months, then the average the number of girls in the school is :
Solution |
10
Discuss
|
The average of two numbers is XY. If one number is X, the other is-
Solution |
# | Quiz |
Copyright © 2020 Inovatik - All rights reserved