Question

Please help me to get correct answer of 8th question

Answer 1

Answer:

Step-by-step explanation:

Answer is 7

Answer 2

Mean is the average of a given set of numbers. Mean is also known as Average or Arithmetic mean.

Mean = $\dfrac{Sum\:of\:observations}{Total\:number\:of\:observations}$


$\boxed{\boxed{\tt{Solution :- }}}$

Given : The mean of 5 observations x, x + 2, x + 4, x + 6 and x + 8 is 11

To find : Value of x

Solution :-

By using the formula of mean, we will find the value of x

Mean = $\dfrac{Sum\:of\:observations}{Total\:number\:of\:observations}$

➾ 11 = $\dfrac{x + x + 2 + x + 4 + x + 6 + x + 8}{5}$

➾ 11 = $\dfrac{5x + 20}{5}$

➾ 11 × 5 = 5x + 20

➾ 55 = 5x + 20

➾ 5x = 55 - 20

➾ 5x = 35

∴ x = 7



∴ The value of x is $\underline{\underline{\mathfrak{7}}}$


$\large{\boxed{\boxed{\tt{Thanks}}}}$