Question

please its urgent the 6 th sum
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Answer 1

Hope it helps....

Please mark brainliest

Answer 2

Mean is the average of given set of numbers. Mean is also known as Average as well as Arithmetic Mean.

Mean = $\dfrac{\textsf{Sum\:of\:observations}}{\textsf{Number\:of\:observations}}$

Now coming to your question

$\textsf{Question}$ :- The mean of 9, 14, x, 16, 7 and 18 us 11.5 . Find the value of x.

$\textsf{Answer}$ :-

Mean = $\dfrac{\textsf{Sum\:of\:observations}}{\textsf{Number\:of\:observations}}$

☛ 11.5 = $\dfrac{\textsf{9 + 14 + x + 16 + 7 + 18}}{\textsf{6}}$

☛ 11.5 × 6 = 64 + x

☛ 69 = 64 + x

☛ 64 + x = 69

☛ x = 69 - 64

☛ x = 5

∴ The value of x is $\boxed{\boxed{\textsf{5}}}$