Page 235 - Maths Skills - 8

Answers 233

Exercise - 12.1

1. Marks (%) Frequency Tally Marks 2. (i) Age Frequency Tally Marks
10-20 1 | 10-19 6 |
20-30 4 |||| 20-29 11 |
30-40 2 || 30-39 14 ||||
40-50 5 40-49 10
50-60 6 | 50-59 7 ||
60-70 4 |||| 60-69 2 ||
70-80 5 Total = 50
80-90 1 | (ii) Age Frequency Tally Marks
90-100 2 || 15-19 4 ||||
Total = 30 19-23 5
23-27 3 |||

27-31 6 |
3. Class Interval Frequency Tally Marks 31-35 4 ||||
0-5 1 | 35-39 7 ||
5-10 7 || 39-43 7 ||
10-15 7 || 43-47 2 ||
15-20 4 |||| 47-51 4 ||||
20-25 1 | 51-55 5
Total = 20
55-59 1 |
+
(i) 20 (ii) 0-5 and 20-25 (iii) 10 15 = 12.5 59-63 2 ||
2 Total = 50
4. (i) 300-325 (ii) 200 (iii) 150-175 and 225-250
(iv) 25 (v) 237.5

Exercise - 12.2

1. 4.

2. (i) 22 (ii) 2 (iii) Most: Car; Least: Taxi
(iv) It is same as 22.7% each. (i) Monika (ii) Amit (iii) Abhishek
3. (i) 100 (ii) Mango (iii) 172 (iv) 80
(v) Chocolate (vi) 330