ANSWERS/HINTS 343
File Name : C:\Computer Station\Maths-IX\Chapter\Answers (16–12–2005) PM65
- Primary data; (i), (ii) and (iii)
Secondary data; (iv) and (v)
EXERCISE 14.2
- Blood group Number of students
A9
B6
O1 2
AB 3
Total 30
Most common – O , Rarest – AB
2.
Distances Tally Marks Frequency
(in km)
0 - 5 |||| 5
5 - 10 |||| |||| | 11
10 - 15 |||| |||| | 11
15 - 20 |||| |||| 9
20 - 25 | 1
25 - 30 | 1
30 - 35 || 2
Total 40
- (i) Relative humidity (in %) Frequency
84 - 86 1
86 - 88 1
88 - 90 2
90 - 92 2
92 - 94 7
94 - 96 6
96 - 98 7
98 - 100 4
Total 30