Question

Q. If the mean of the following frequency distribution is 65.6. Find the missing frequencies f1 and f2.

$\boxed {\sf{class \: \: | 1 0 - 30 \: |30 - 50 \: | 50 - 70 \: |70 - 80|90 - 110 |110 - 130 }} \\ \boxed{ \sf{frequency \: \: \: \: | \: \: 5 \: \: | \: \: \: \: 8 \: \: | \: \: \: \: \: f1 \: | \: \: \: 20 \: \: | \: \: \: \: \: f2 \: \: \: \: \: \: | \: \: \: 2 \: \: \: \: }}$
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Answer 1

Question ⤵

If the mean of the following frequency distribution is 65.6. Find the missing frequencies f1 and f2.

$\boxed {\sf{class \: \: | 1 0 - 30 \: |30 - 50 \: | 50 - 70 \: |70 - 80|90 - 110 |110 - 130 }} \\ \boxed{ \sf{frequency \: \: \: \: | \: \: 5 \: \: | \: \: \: \: 8 \: \: | \: \: \: \: \: f1 \: | \: \: \: 20 \: \: | \: \: \: \: \: f2 \: \: \: \: \: \: | \: \: \: 2 \: \: \: \: }}$

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To Find ⤵

$f _{1} \: and \: f_{2}$

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Solution ⤵

$\Rightarrow$Refer To The Attachment