The median is independent of the change of which of the following?

Find the mode of the given frequency distribution.

Class	$0-10$	$10-20$	$20-30$	$30-40$	$40-50$	$50-60$	$60-70$	$70-80$
$f_i$	$2$	$18$	$30$	$45$	$35$	$20$	$6$	$3$

If $\text{mean} = (3 \text{median} - \text{mode}) k$,then the value of $k$ is

If in a moderately asymmetrical distribution,the mode and mean of the data are $6 \lambda$ and $9 \lambda$ respectively,then the median is:

If $\text{Mean} = x(3 \times \text{Median} - \text{Mode})$,then what is the value of $x$?

In a series,if $4$ appears $3$ times,$5$ appears $4$ times,$6$ appears $5$ times,$7$ appears $8$ times,$8$ appears $7$ times,and $9$ appears $6$ times,then the mode of the numbers is = .......