Classes | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 | 100-120 | 120-140 |
Frequency | 6 | 8 | 10 | 12 | 6 | 5 | 3 |
A)
Mean Median Mode 50.67 62.67 64.5
B)
Mean Median Mode 60.67 52.42 64.5
C)
Mean Median Mode 62.4 61.67 65
D)
Mean Median Mode 62.4 62.42 65
Correct Answer: C
Solution :
Class | \[({{x}_{i}})\] | Frequency \[({{f}_{i}})\] | \[{{x}_{i}}{{f}_{i}}\] | Cumulative frequency (cf) |
0-20 | 10 | 6 | 60 | 6 |
20-40 | 30 | 8 | 240 | 14 |
40-60 | 50 | 10 | 500 | 24 |
60-80 | 70 | 12 | 840 | 36 |
80-100 | 90 | 6 | 540 | 42 |
100-120 | 110 | 5 | 550 | 47 |
120-140 | 130 | 3 | 390 | 50 |
Total | \[\Sigma {{f}_{i}}=50\] | \[\Sigma {{f}_{i}}{{x}_{i}}=3120\] |
You need to login to perform this action.
You will be redirected in
3 sec