Selina Concise Class 8 Math Chapter 22 Data Handling Exercise 22A Solution
Concise Mathematics – Class 8 Selina Exercise 22A Solution by experts | 22A Selina Concise Solution Class 8 | Class 8 Selina Concise Ex 22A Page 248 Solution | RK Bansal Class 8 ICSE Book Solution Online.
Exercise 22(A)
(1) Arrange the following data as an array (in ascending order)
(i) 7, 5, 15, 12, 10, 11, 16
(ii) 6.3, 5.9, 9.8, 12.3, 5.6, 4.7
Solution: (i) 5, 7, 10, 11, 12, 15, 16
(ii) 4.7, 5.6, 5.9, 6.3, 9.8, 12.3
(2) Arrange the following data as an array (descending order)
(i) 2, 0, 3, 4, 1, 2, 3, 5
(ii) 9.1, 3.7, 5.6, 8.3, 11.5, 10.6
Solution: (i) 5, 4, 3, 3, 2, 2, 1, 0
(ii) 11.5, 10.6, 9.1, 8.3, 5.6, 3.7
(3) Construct a frequency table for the following data:
(i) 6,7, 5, 6,8, 9, 5, 5, 6, 7, 8, 9, 8, 10, 10, 9, 8, 10, 5, 7, 6, 8
(ii) 3, 2, 1, 5, 4, 3, 2, 5, 5, 4, 2, 2, 2, 1, 4, 1, 5, 4
(4) Following are the marks obtained by 30 students in an examination.
Taking class intervals 0 -1, 10-20, ________, 40-50; construct a frequency table.
(5) Construct the frequency distribution table for the following data, taking class intervals 4-6, 6-8, _____, 14 – 16.
Solution:
(6) Fill in the blanks:
(i) Lower class limit of 15 – 18 is ________
Ans. 15
(ii) Upper class limit 24 – 30 is _______
Ans. 30
(iii) Upper limit of 5 – 12.5 is ______
Ans. 12.5
(iv) If the upper and the lower limits of a class interval are 16 and 10, the class interval is _____
Ans. 10 – 16
(v) If the lower and the upper limits of a class interval are 7.5 and 12.5, the class interval is ______
Ans. 7.5 – 12.5
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