Question

The average of 11 and 23 and k is 40 find the value of k?

Answer 1

Hi there!
Here's the answer:

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¶ Average = (Sum of Observations) / (No. of Observations)


Given,
The Observations are 11, 23, k

=> No. of observations = 3

Sum of Observations = 11 + 23 +k = 34+k


Also Given that,
Average = 40

From Formula we have,
Avg = sum/No.

40 = (34+k)/3
=> 34+k = 120
=> k = 120 - 34
=> k = 86


•°• Required value of k = 86.


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:)

Hope it helps

Answer 2

Concept-

Use the concept average = (sum of observation) / (number of observation)

Given-

Average of 11 and 23 and k is given as 40.

Find-

Find the value of k.

Solution-

Is given,

The average of 11 and 23 and is 40.

Observations are 11, 23, k

⇒ Number of observations = 3

⇒ Sum of observations = 11 + 23 +k = 34+k

Also given that

Average = 40

From the formula we have,

Average=(sum of observation)/(number of observation)

⇒ 40 = (34+k)/3

⇒ 34+k = 120

⇒ k = 120 - 34

⇒ k = 86

So the value of k is 86.

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