Question

The mean of 3,7,9,12,x and 13 is 9.find x.​

Answer 1

Answer:

Pahala follow Karo Tabhi bataogi

Answer 2

• Given

• Data - 3, 7, 9, 12, x, 13
• Mean - 9

• To find

• Value of x

• Solution

Formula to find mean = Sum of all the terms/No. of terms

Substitute the given values.

⇛ 9 = (3 + 7 + 12 + x + 13)/5

⇛9 = (35 + x)/5

⇛ 9 × 5 = 35 + x

⇛ 45 = 35 + x

⇛ 45 - 35 = x

⇛ 10 = x

• The value of x = 10

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✤ How to solve?

Firstly, what is mean?

• It is the sum of value divided by the no. of values.

• It is the average of the no.s

• How it is calculated -

Formula to calculate mean -

Mean = Sum of all the terms/No. of terms

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