Online Test      LOGIN      SIGN UP
Forgot your password?
  • SSC CHSL Exam SSC CHSL Quantative Aptitude 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 SSC CHSL Quantative Aptitude Statistics for SSC CHSL Exam student. This free online SSC CHSL Quantative Aptitude study material for SSC CHSL Exam will help students in learning and doing practice on Statistics topic of SSC CHSL Exam SSC CHSL Quantative Aptitude. The study material on Statistics, help SSC CHSL Exam SSC CHSL Quantative Aptitude students to learn every aspect of Statistics and prepare themselves for exams by doing online test exercise for Statistics, as their study progresses in class. Kidsfront provide unique pattern of learning SSC CHSL Quantative Aptitude with free online comprehensive study material and loads of SSC CHSL Exam SSC CHSL Quantative Aptitude Statistics exercise prepared by the highly professionals team. Students can understand Statistics concept easily and consolidate their learning by doing practice test on Statistics regularly till they excel in SSC CHSL Quantative Aptitude Statistics.


Statistics
The average marks secured by 36 students was 52. but it was discovered that an item 64 was misred as 64.what is the correct mean of mark?

a) 54
b) 53.5
c) 53
d) 52.5



Answer
Correct Answer Is : 52.5
Solution Is :
The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C, then the temperature of the 4th day is

a) 25.2°C
b) 25.5°C
c) 25.6°C
d) 25°C



Answer
Correct Answer Is : 25.6°C
Solution Is :
Find the mean of the first 6 prime numbers?

a) 15 / 3
b) 6
c) 41 / 6
d) 12 /4



Answer
Solution
Correct Answer Is : 41 / 6
Solution Is : The first 6 prime numbers are 2 , 3 , 5 , 7 ,11 , 13 Mean = ( 2 + 3 + 5 + 7 + 11 + 13 ) / 6 = 41 / 6
The mean proportion of 1.21 and 0.09 is

a) 0.33
b) 3.03
c) 3.3
d) 0.033



Answer
Solution
Correct Answer Is : 0.33
Solution Is : Mean proportion = √ab here, a=121 and b= 0.09 So, Mean proportion = √121*0.09 = √121/100 * 9/100 √11*11/10*10 * 3*3/10*10 = 11*3/100 = 33/100 = 0.33.
The arithmetic mean (average) of the first 10 whole numbers is

a) 5
b) 4
c) 5.5
d) 4.5



Answer
Solution
Correct Answer Is : 4.5
Solution Is : (4) Required average =(0+1+2+3+....+9)/10 =(9*(9+1))/(2*10) 4.5
The mean of 9 observations is 16. One more observation is included and the new mean becomes 17. The 10th observation is

a) 9
b) 16
c) 26
d) 30



Answer
Solution
Correct Answer Is : 26
Solution Is : (3) Tricky Approach Tenth observation =10*17-16*9 =170-144 =26
The average of x numbers is y and average of y numbers is x. Then , the average of all the numbers taken together is

a) (x+y )/ 2xy
b) 2xy / (x+y)
c) (x2 + y2) /(x+y)
d) Xy/(x+y)



Answer
Solution
Correct Answer Is : 2xy / (x+y)
Solution Is : Average of x nuber is y . Sum of x numbers = x * y = xy Similarly , average of y numbers is x , Sum of y numbers = y * x = xy Sum of total numbers = xy + xy = 2xy Average of totasl numbers = 2xy / (x+y)
The mean value of 20 observation was found to 75, but later on it was detected that 97 was misread as 79. Find the correct mean.

a) 75.7
b) 75.8
c) 75.9
d) 75.6



Answer
Solution
Correct Answer Is : 75.9
Solution Is :
Given the mean of five numbers is 27. If one of them is excluded , the mean gets reduced by 2. Determine the excluded number.

a) 45
b) 55
c) 25
d) 35



Answer
Solution
Correct Answer Is : 35
Solution Is : Mean of 5 numbers = 27
Sum of 5 numbers = 27x5 = 135
Now , Mean of 4 numbers after exclusion of a number = 25
Sum of 4 numbers = 25 x 4 = 100
Excluded number = Sum of 5 numbers - sum of 4 numbers
= 135 - 100 = 35
If x is the mean of n observations x1 , x2 , ...... xn , then the mean of x1/a , x2/a , ,,,,, xn/a is

a) X
b) A x
c) X/a
d) X + a



Answer
Solution
Correct Answer Is : X/a
Solution Is : When each number is divided by`a` then mean is also divided by`a`
New mean = x/a
PREVIOUS

Preparation for Exams

script type="text/javascript">