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  • Delhi Police Exam Numerical Ability 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 Numerical Ability Statistical for Delhi Police Exam student. This free online Numerical Ability study material for Delhi Police Exam will help students in learning and doing practice on Statistical topic of Delhi Police Exam Numerical Ability. The study material on Statistical, help Delhi Police Exam Numerical Ability students to learn every aspect of Statistical and prepare themselves for exams by doing online test exercise for Statistical, as their study progresses in class. Kidsfront provide unique pattern of learning Numerical Ability with free online comprehensive study material and loads of Delhi Police Exam Numerical Ability Statistical exercise prepared by the highly professionals team. Students can understand Statistical concept easily and consolidate their learning by doing practice test on Statistical regularly till they excel in Numerical Ability Statistical.


Statistical
Find the mean of the first 6 prime numbers?

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


✔Answer
Correct Answer Is : 41 / 6
Solution Is :
The mean proportion of 1.21 and 0.09 is

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


✔Answer
Correct Answer Is : 0.33
Solution Is :
The arithmetic mean (average) of the first 10 whole numbers is

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


✔Answer
Correct Answer Is : 4.5
Solution Is :
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
Correct Answer Is : 26
Solution Is :
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
Correct Answer Is : 2xy / (x+y)
Solution Is :
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
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
Correct Answer Is : 35
Solution Is :
If x is the mean of n observations x1 , x2 ,

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


✔Answer
Correct Answer Is : X/a
Solution Is :
The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 g. find the weight of the teacher in kg

a) 66
b) 56
c) 55
d) 57


✔Answer
Correct Answer Is : 56
Solution Is :
Study the chart and answer the following question

Themean of the highest and the lowest sale (in rs crore )is

a) 4922
b) 4922.5
c) 4827
d) 4365


✔Answer
Correct Answer Is : 4827
Solution Is :

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