Statistics question

2024 · 9 Apr · Shift 2 · Q43

Statistics question

2024 · 9 Apr · Shift 2 · Q43

If the variance of the frequency distribution

$c$	$2c$	$2c$	$3c$	$4c$	$5c$	$6c$
$f$	2	1	1	1	1	1

is 160, then the value of $c\in N$ is

A
5
B
8
C
6
D
7

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