find the mean of the following questions
X 2 5 7 8
f 2 4 6 3
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Answered by
2
Answer:
Solution -
C.I 0-10 10-20 20-30 30-40 40-50
Frequency 8 X 10 11 9.
Midvalue 5 15 25 35 45
Mean = 25.2
8+x+10+11+9
8×5+15x+10×25+11×35+9×45
=25.2
1080+15x=957.6+25.2x
x=
10.2
122.4
x=12.
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Answered by
2
Answer:
X = 12
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