Question

please answer it.... ​

Answer 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

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Answer 2

Step-by-step explanation:

hope it helps u......❣️