The arithinetic mean of $5, 6, 8, 9, 12, 13, 17$ is

20

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15

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10

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25

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Solution

The correct option is D $10$
Mean $= \frac{Sum of observations}{Total number of observations} = \frac{5 + 6 + 8 + 9 + 12 + 13 + 17}{7} = \frac{70}{7} = 10$

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Frequency	$7$	$12$	$8$	$10$

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

$x$	$5$	$10$	$15$	$20$	$25$
$f$	$3$	$10$	$25$	$7$	$5$

CI	$0 - 5$	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$	$45 - 50$
$f$	$9$	$13$	$6$	$12$	$9$	$6$	$10$	$15$	$6$	$4$

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