The value of the expression -2 - Mean- - Mode - -3- Median- for the data 12- 15- 9- 16- 15- 18- 20 is -

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Median

The value of ...

Question

The value of the expression $[2 \times (M e a n)] + M o d e - [3 \times (M e d i a n)]$ for the data 12, 15, 9, 16, 15, 18, 20 is .

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Solution

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Class-Interval	$3 - 6$	$6 - 9$	$9 - 12$	$12 - 15$	$15 - 18$
Frequeency	$2$	$3$	$1$	$10$	$5$

$C I$	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$
$f$	$5$	$12$	$3$	$11$	$9$