Class | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 |
Frequency | 7 | p | 10 | 9 | 13 |
Answer:
Mean
Mid-values (x)
Frequency (f)
fx
10
30
50
70
90
7
P
10
9
13
70
30p
500
630
1170
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