Question

if 7 is the mean. 3, 6, a, 9 and 10, find the value of a.

Answer 1

Answer:

now follow me

if my answer is correct

Answer 2

Answer:

7

Step-by-step explanation:

Concept= Mean

Given= Values and Mean

To Find= Missing value

Explanation=

We have been given a set of value and its mean.

The set of values are 3,6,a,9,10.

The mean is 7.

Here the unknown value is 'a'.

We have been given mean and we need to find the unknown value.

Mean is the summation of the values divided by the number of values.

Here the count of values is 5. The mean is 7.

Mean = ∑values/count

Mean= (3+6+a+9+10)/5

7= (3+6+a+9+10)/5

35= (3+6+a+9+10)

35= 28+a

a= 35-28

a=7

Therefore value of unknown 'a' is 7.

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