Question

no one gives answer step by step. pls help me with this sum​

Answer 1

Step-by-step explanation:

i hope it is clear now and if it is clear ao please mark me as brainliest

Answer 2

Step-by-step explanation:

mean of 2,12,4,9,5,16 = x

$mean = \frac{sum \: of \: observations}{number \: of \: observations}$

$\frac{2 + 12 + 4 + 9 + 5 + 16}{6} = x$

$\frac{48}{6} = x$

$x = 8$

median of 4,3,x,x-1,12,16 = y................(eq no. 1)

substuting x = 8 in eq no. 1

= 4,3,8,8-1,12,16

=4,3,8,7,12,16

Arranging In Ascending Order

= 3,4,7,8,12,16

n = 6 (even number)

we know the formula when n is even number.

${ \frac{n}{2} }^{th} \: term \: and \: { \frac{n + 2}{2} }^{th} \: term$

$n = 6$

${ \frac{6}{2} }^{th} \: term \: and \: { \frac{6 + 2}{2} }^{th} \: tem$

${ \frac{6}{2} }^{th} \: term \: and \: { \frac{8}{2} }^{th} \: term$

$= {3}^{rd} \: and \: {4}^{th} \: terms$

3rd number = 7

4th number = 8

the average of 3rd and 4th terms

$\frac{7 + 8}{2} = y$

$= \frac{15}{2} = y$

$7.5 = y$

∴ x = 8

y = 7.5