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  • SSC Constable GD Exam Elementary Mathematics Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of Elementary Mathematics Averages for SSC Constable GD Exam student. This free online Elementary Mathematics study material for SSC Constable GD Exam will help students in learning and doing practice on Averages topic of SSC Constable GD Exam Elementary Mathematics. The study material on Averages, help SSC Constable GD Exam Elementary Mathematics students to learn every aspect of Averages and prepare themselves for exams by doing online test exercise for Averages, as their study progresses in class. Kidsfront provide unique pattern of learning Elementary Mathematics with free online comprehensive study material and loads of SSC Constable GD Exam Elementary Mathematics Averages exercise prepared by the highly professionals team. Students can understand Averages concept easily and consolidate their learning by doing practice test on Averages regularly till they excel in Elementary Mathematics Averages.


Averages
The average age of students of a school is 6 years and the average age of 12 teachers is 40 yers.If the average age of all teachers and students together is 7 years. Then find out the numbers of students in the school ?

a) 396
b) 400
c) 408
d) 416



Answer
Correct Answer Is : 396
Solution Is :
In three numbers first number is twice of second and second number is twice of third. If the average of these three number is 105.Then find out the largest of these three numbers.

a) 120
b) 150
c) 180
d) 300



Answer
Correct Answer Is : 180
Solution Is :
A batsman makes a score of 99runs in the 28th innings and thus increase his average by 2.25 runs. What his average after 28th inning ?

a) 38.25
b) 37.25
c) 39
d) 67



Answer
Correct Answer Is : 38.25
Solution Is :
A batsman make a score of 38 runs in 24 innings and thus decreases his average by 0.75.What is his average after 23 rd innings ?

a) 65 runs
b) 58 runs
c) 56 runs
d) 87 runs



Answer
Correct Answer Is : 56 runs
Solution Is :
The average age of 18 students decreased by 0.5 years when a students of age 22 years , is replaced by anew students .What will be the age of the new students ?

a) 11 years
b) 15 years
c) 13 years
d) 9 years



Answer
Correct Answer Is : 13 years
Solution Is :
The average monthly salary of 25 employees in a factory is 1200.If the directors salary is added then the average salary increases by 250.What is the director `s monthly salary ?

a) 7700
b) 6517
c) 9000
d) 5500



Answer
Correct Answer Is : 7700
Solution Is :
The sum of four consecutive odd numbers is 138 more than their average. Find the smallest number ?

a) 56
b) 46
c) 40
d) 21



Answer
Correct Answer Is : 46
Solution Is :
The average of 12, 22, 32, 42, 52, 62, 72, 82, 92, 102 is

a) 46.5
b) 50.5
c) 38.5
d) 42.5



Answer
Solution
Correct Answer Is : 38.5
Solution Is : Sum of square of n natural numbers = 1/6n ( n+1 ) ( 2n + 1 ) Average of square of n natural numbers 1/6n (n+1) (2n+1)/n =1/6 (n+1) (2n+1) putting n = 10, Required sum = 1/6 ( 10 +1 ) ( 2 * 10 + 1 ) 1/6 * 11 * 21 = 38.5
There are three baskets of fruits. First basket has twice the number of fruits in the 2nd basket. Third basket has 3/4 th of the fruits in the first. The average of the fruits in all baskets in 30. What is the number of fruits in the first basket ?

a) 20
b) 30
c) 35
d) 40



Answer
Solution
Correct Answer Is : 20
Solution Is : Suppose number of fruits in 2nd basket be x. Number of fruits in 1st basket = 2x and number of fruits in 3rd basket = 2x * 3/4 = 3x/2 then, x + 2x + 3x/2 = 30 * 3 2x + 4x + 3x = 90 9x = 90 x = 90/9 = 10
Geetha weighs 11.235 kg. Her sister weighs 1.4 times her weight. Find their combined weight?

a) 15.729 kg
b) 25.964 kg
c) 26.964 kg
d) 26.964 kg



Answer
Solution
Correct Answer Is : 26.964 kg
Solution Is : Geetha`s weight = 11.235 kg Her sister`s weight = 1.4 (11.235) = 15.729 Combined weight = 15.729 + 11.235 = 26.964
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