Question

The mean of 8, 10, p, 12 is 9. find the value of p

Answer 1

Answer:

6 ans

Step-by-step explanation:

here, No. of data(N)=4

sum of data=8+10+p+12

=30+p

Mean(x)=9

Now,

Mean(x)=Ex/N

9=30+p/4

= 36=30+p

=36-30=p

=p=6ans

Answer 2

Answer:

Required value of p is 6.

Step-by-step explanation:

Given, numbers are 8, 10, p, 12 and mean of these numbers is 9.

We want to find value of p.

We know, mean

$= \frac{sum \: of \: numbers}{total \: numbers}$

For example, mean of 2,3,4,5 is

$\frac{2 + 3 + 4 + 5}{4} \\ = \frac{14}{4} \\ = \frac{7}{2} \\ = 3.5$

According to question,

$\frac{8 + 10 + p + 12}{4} = 9 \\ \frac{30 + p}{4} = 9 \\ 30 + p = 36 \\ p = 36 - 30 \\ p = 6$

Therefore, required value of p is 6.

This is a problem of mean.

Mean means average .

Know more about average:

https://brainly.in/question/51041478

https://brainly.in/question/5394886

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