Question

If the mean of 6,9,10, x, 15 is 11. Find the value of x .​

Answer 1

Answer:

• The value of x is 15.

Step-by-step explanation:

Given that:

• The mean of 6, 9, 10, x, 15 is 11.

To Find:

• The value of x.

Formula used:

• Mean = (Sum of observations)/(Number of observations)

We have:

• Mean = 11
• Sum of observations = 6 + 9 + 10 + x + 15 = 40 + x
• Number of observations = 5

Finding the value of x:

⟶ 11 = (40 + x)/5

⟶ 11 × 5 = 40 + x

⟶ 55 = 40 + x

⟶ x = 55 - 40

⟶ x = 15

∴ The value of x = 15

Answer 2

Mean = [Sum of Observation] / [Number of Observation]

• Mean = 11
• Sum of Observation = 6+9+10+x+15 = 40 + x
• Number of Observation = 5

11 = [ 40 + x ] / 5

40 + x = 55

x = 15

Value of x is 15.

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