NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 1
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Exercise 14.1
1. The class mark of the class is:
(A)
(B)
(C)
(D)
Answer: B
2. The range of the data:
is
(A)
(B)
(C)
(D)
Answer: D
3. In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The lower limit of the class is:
(A) 6
(B) 7
(C) 8
(D) 12
Answer: B
4. The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The upper class-limit of the highest class is:
(A) 15
(B) 25
(C) 35
(D) 40
Answer: C
5. Let m be the mid-point and l be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is:
(A)
(B)
(C)
(D)
Answer: B
6. The class marks of a frequency distribution are given as follows: The class corresponding to the class mark 20 is:
(A)
(B)
(C)
(D)
Answer: B