Question

3 f the
the mean
of 3, 5, 9,x and 17 is 9 . what is the value of x?​

Answer 1

Answer:

Mean = 3 + 5 + 9 + x + 17 / 5

9 = 34 + x / 5

9 × 5 = 34 + x

45 = 34 + x

x = 45 - 34

x = 11

Answer 2

Answer:

11

Step-by-step explanation:

$\frac{3 + 5 + 9 + x + 17}{5} = 9 \\ \\ \frac{34 + x}{5} = 9 \\ \\ 34 + x = 9 \times 5 = 45 \\ \\ \\ 34 + x = 45 \\ \\ x = 45 - 34 \\ \\ x = 11$