Find the value of p if the mean ofnfollowing data is 18. variate(x) 13 15 17 19 20+p 23 frequency 8 2 3 4 5p

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p

18

Variate $(x)$	$13$	$15$	$17$	$19$	$20 + p$	$23$
Frequency $(f)$	$8$	$2$	$3$	$4$	$5 p$	$6$

p

20

$x$ :	$15$	$17$	$19$	$20 + p$	$23$
$f$ :	$2$	$3$	$4$	$5 p$	$6$

x	15	17	19	20 + p	23
f	2	3	4	5p	6

18

19 - 21

Class	$11 - 13$	$13 - 15$	$15 - 17$	$17 - 19$	$19 - 21$	$21 - 23$	$23 - 25$
Frequency	$3$	$6$	$9$	$13$	$f$	$5$	$4$

If the mean of the data given below is 18, find R ?

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