please answer it....
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priya6386:
hello
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Answered by
1
HI HERE IS YOUR ANSWER DEAR
MEAN = 26.7
OBSERVATIONS =
15 , 20, 25, 30, 35, 40
FREQUENCY
4, 8, 18, F, 7, 3= 》 40 + f = sum f
X
15 × 4 = 60
20 × 8 = 160
25×18 = 450
30 × F = 30 F
40 × 3 = 120
total = 790 + 30f = sum fx
Mean ===》》
\huge \frac{sumfx}{sum \: f}
sumf
sumfx
\begin{lgathered}\huge \bold{ \frac{790 + 30f}{40 + f} } = 26.7 \\ \\\end{lgathered}
40+f
790+30f
=26.7
\bold{790 + 30f = 1068 + 26.7f}790+30f=1068+26.7f
\bold{178 = 3.3f}178=3.3f
\huge \bold \red{f = > 53.9}f=>53.9
please mark me as a brain list sister
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hope it helps u......❣️
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