
Q12 Calculate the mean deviation about median age for the age distribution of 100 persons given below: Age 1620 2125 2630 3135 3640 4145 4650 5155 Number 5 6 12 14 26 12 16 9 Ans: Our Experts will give the answer soon.
Welcome to the Stastistics Class 11 Mathematics NCERT Solutions page. Here, we provide detailed question answers for Chapter 15  Stastistics, designed to help students gain a thorough understanding of the concepts related to natural resources, their classification, and sustainable development.
Our solutions explain each answer in a simple and comprehensive way, making it easier for students to grasp key topics and excel in their exams. By going through these Stastistics question answers, you can strengthen your foundation and improve your performance in Class 11 Mathematics. Whether you're revising or preparing for tests, this chapterwise guide will serve as an invaluable resource.
This branch of Mathematics deals with a large number of data. When data is large it is very difficult to handle and we can not reach the exact result if we do it manually. Some methods are necessary for this and these methods will be provided in this chapter. Some topics are studied in earlier classes such as 8,9,10. Now, we extend our periphery. This chapter consists of measures of dispersion; mean deviation, variance and standard deviation of ungrouped/grouped data, analysis of frequency distributions with equal means but different variances.
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Q12  Calculate the mean deviation about median age for the age distribution of 100 persons given below: Age 1620 2125 2630 3135 3640 4145 4650 5155 Number 5 6 12 14 26 12 16 9 
Ans:  Our Experts will give the answer soon. 
Find the sum of integers from 1 to 100 that are divisible by 2 or 5.
If the sum of three numbers in A.P., is 24 and their product is 440, find the numbers.
A wheel makes 360 revolutions in one minute. Through how many radians does it turn in one second?
The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.
How many terms of G.P. 3, 3^{2}, 3^{3}, … are needed to give the sum 120?
Find the sum of all numbers between 200 and 400 which are divisible by 7.
Insert five numbers between 8 and 26 such that the resulting sequence is an A.P.
Find the sum of all two digit numbers which when divided by 4, yields 1 as remainder.
Find the 20th and nthterms of the G.P.
How many terms of G.P. 3, 3^{2}, 3^{3}, … are needed to give the sum 120?
2 boys and 2 girls are in Room X, and 1 boy and 3 girls in Room Y. Specify the sample space for the experiment in which a room is selected and then a person.
Find the sum of all two digit numbers which when divided by 4, yields 1 as remainder.
The sum of some terms of G.P. is 315 whose first term and the common ratio are 5 and 2, respectively. Find the last term and the number of terms.
How many 3digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that
(i) repetition of the digits is allowed?
(ii) repetition of the digits is not allowed?
Find the sum to n terms in the geometric progression
The 4th term of a G.P. is square of its second term, and the first term is –3. Determine its 7th term.
Find the sum of all numbers between 200 and 400 which are divisible by 7.
The sum of three numbers in G.P. is 56. If we subtract 1, 7, 21 from these numbers in that order, we obtain an arithmetic progression. Find the numbers.