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The following is a frequency distributio...

The following is a frequency distribution of marks:

If a and b are equal, find their values. Draw a histogram and a frequency polygon.

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`12+a+30+b+12+10=100`
`:.a+b+64=100`
`:.a+b=100-64=36`
`:.a=b=18`
The value of a and b are 18 each.
Tabulation for histogram and frequency polygon:
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