Class Interval | Frequency |
0 - 10 | 4 |
10 - 20 | 6 |
20 - 30 | 10 |
30 - 40 | 16 |
40 - 50 | 14 |
A) 25
B) 35
C) 30
D) 31
Correct Answer: D
Solution :
Class Interval | Mid Point | Freq. | Diff, From \[(A=25)\] | fd |
\[0-10\] | 5 | 4 | \[-20\] | \[-80\] |
\[10-20\] | 15 | 6 | \[-10\] | \[-60\] |
\[20-30\] | 25 | 10 | 0 | 0 |
\[30-40\] | 35 | 16 | 10 | 160 |
\[40-50\] | 45 | 14 | 20 | 280 |
Total | \[\Sigma \,f=50\] | \[\Sigma \,fd=300\] |
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