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UNIT TEST

Unit test · Ch 13: Statistics

20marks
11questions
60%to pass
4checks left

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Series RTEQ.P. Code 77/-2/0
Roll No.

RTE LEARN · CBSE PATTERN 2026–27

MATHEMATICS

Unit test · Ch 13: Statistics

Time allowed : 40 MinutesMaximum Marks : 20

General Instructions :

Read the following instructions carefully and follow them :

(i)This question paper contains 11 questions. All questions are compulsory.
(ii)This question paper is divided into three sections – A, B and C.
(iii)In Section A, Question numbers 1 to 5 carry 1 mark each.
(iv)In Section B, Question numbers 6 to 8 are very short answer (VSA) type questions carrying 02 marks each.
(v)In Section C, Question numbers 9 to 11 are short answer (SA) type questions carrying 03 marks each.
(vi)Draw neat figures wherever required. Take π = 22/7 wherever required, if not stated.
(vii)Use of calculators is not allowed.

SECTION A

This section comprises 5 questions of 1 mark each.

1.
For the data with classes 0-10, 10-20, 20-30, 30-40 with frequencies 6, 12, 17, 17, write the median class.
1
2.
The mean of a distribution is 18 and its median is 20. Using the empirical relation, find the mode.
1
3.
Write the formula for the mode of grouped data and name each symbol.
1
4.
For a distribution Σf = 40 and Σfx = 1360. Find the mean.
1
5.
Find the class mark of the class 25-40.
1

SECTION B

This section comprises 3 very short answer (VSA) type questions of 2 marks each.

6.
Find the mode of the data with classes 0-10, 10-20, 20-30, 30-40, 40-50 with frequencies 5, 8, 19, 11, 7.
2
7.
A 'less than' table is: less than 10 - 5, less than 20 - 14, less than 30 - 30, less than 40 - 38, less than 50 - 40. Write the frequency of each class.
2
8.
Find the mean of the data with classes 10-20, 20-30, 30-40, 40-50 with frequencies 3, 5, 9, 3.
2

SECTION C

This section comprises 3 short answer (SA) type questions of 3 marks each.

9.
A 'more than or equal to' table is: 0 or more - 50, 10 or more - 45, 20 or more - 35, 30 or more - 22, 40 or more - 10, 50 or more - 0. Find the median.
3
10.
The mean of the data with classes 10-20, 20-30, 30-40, 40-50, 50-60 and frequencies 2, 2, f, 2, 3 is 36. Find the missing frequency f.
3
11.
Find the median of the data with classes 0-10, 10-20, 20-30, 30-40, 40-50 with frequencies 4, 8, 16, 14, 8.
3

✦ ✦ ✦

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Q6 · 2/2Full marks. Correct method and the final answer is clearly stated.
Q7 · 1/2Right approach, but one step of working is missing. Show every step to get full marks.
Q8 · 2/2Well explained, with correct units and a neat diagram.
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