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(D) In the formula for the mode of a grouped frequency distribution,$f_{1}$ represents the frequency of the modal class,$f_{0}$ represents the frequen

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$8, 25$ and $20$

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(D) In the formula for the mode of a grouped frequency distribution,$f_{1}$ represents the frequency of the modal class,$f_{0}$ represents the frequency of the class preceding the modal class,and $f_{2}$ represents the frequency of the class succeeding the modal class.Given that the modal class is $70-85$ with frequency $25$,we have $f_{1} = 25$.The frequency of the class preceding the modal class is $8$,so $f_{0} = 8$.The frequency of the class succeeding the modal class is $20$,so $f_{2} = 20$.Therefore,the values of $f_{0}, f_{1}$ and $f_{2}$ are $8, 25$ and $20$ respectively.

Class	$1-3$	$3-5$	$5-7$	$7-10$
Frequency	$9$	$22$	$27$	$17$

Class (seconds)	$13.8-14.0$	$14.0-14.2$	$14.2-14.4$	$14.4-14.6$	$14.6-14.8$	$14.8-15.0$
Frequency	$2$	$4$	$5$	$71$	$48$	$20$

In a frequency distribution,the modal class is $70-85$ with frequency $25$. The frequencies of the classes succeeding and preceding the modal class are $20$ and $8$ respectively. Then,the values of $f_{0}, f_{1}$ and $f_{2}$ are respectively.

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