Question

If 1, 4, x, 5 and 12 is 7, then the value of x is
(A) 6
(B)8
(C) 13
(d)9​

Answer 1

Answer:

7=(1+4+5+12+x)/5

35=22+x

x=13

Answer 2

/* There is a mistake in the problem */

It must be like this .

If the mean of 1, 4, x, 5 and 12 is 7, then the value of x is ?

$Given \: terms : 1,4, x , 5 \:and \: 12$

$\boxed { \pink { Mean = \frac{sum \:of \:the \:terms }{ Number \:of \:terms }}}$

$\implies Mean = 7 \: (given )$

$\implies \frac{1+4+x+5+12}{5} = 7$

$\implies 22 + x = 5 \times 7$

$\implies x = 35 - 22$

$\implies x = 13$

Therefore.,

$Option \pink { ( C )} \: is \: correct$

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