class 7 maths chapter 3 ex. 3.1 question 8 and 9
Answers
Step-by-step explanation:
THESE ARE YOUR ANSWERS MARK ME BRAINLIEST
8 = a : maximum rainfall - 20.5
minimum rainfall -0.0
Range :max-min
20.5-0.0
= 20.5 Answer
b. Mean : = sum of data
total data
0.0+12.2+2.1+0.0+20.5+5.5+1.0
7
= 41.3
7 = 5.9 Answer
c . rainfall less than mean .
mean was 5.9
1 Monday (0.0)
2 Wednesday (2.1)
3 Thursday (0.0)
4 Saturday (5.5)
5 Sunday (1.0)
on 5 days rainfall was less then the mean rainfall .
9 = a: tallest girl = 151cm
b : shortest girl = 128 cm
c : range = max-min
151-128
= 23 cm
d mean = sum of data
total data
= 135+150+139+128+151+132+146+149+143+141
10
= 1414
10 = 141.4cm answer
e : mean height = 141.4 cm
so 135, 139,128,132,141
5 girls are having height more than mean height.