$A$ set of numbers consists of three $4$'s,five $5$'s,six $6$'s,eight $8$'s,and seven $10$'s. The mode of this set of numbers is:

Find the mode of the following frequency distribution.

Class	$1 - 10$	$11 - 20$	$21 - 30$	$31 - 40$	$41 - 50$
$f_i$	$5$	$7$	$8$	$6$	$4$

If each term of a distribution is increased by $2$,what will happen to the median and the standard deviation of the distribution?

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

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

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 = .......