Question

The following table shows the number of police calls that were made last year in each of the cities in Hogdon County. If the mean of the data set is 273 calls, find the number of police calls in Thornbury.

Answer 1

`222` - written in
`2/24/2021`

Explanation:

The answer is
`222` because...

First Step:

Multiply the mean by how many numbers in total there are, including the
`?` mark:
`273` *
`5=1365`

Second Step:

Add up all the numbers, not including the
`?` mark:
`244+353+235+311=1143`

Third Step:

Now subtract those numbers:
`1365-1143=222`

Fourth Step/Final answer:

Now we know that the answer is
`222`

Answer 2

222 Calls

Explanation:

We are given four values and the mean of the given data, so in order to find the fifth value, we will use the formula for mean. The formula for mean is:

Mean=(∑x)/n

Here n is the total number of values which is 5

Let x_5 be the number of calls for Thornbury

Putting the values of mean and the data given

273=(244+353+235+311+x_5)/5

273*5=1143+x_5

1365=1143+x_5

x_5=1365-1143

x_5=222 Calls

So the number of police calls in Thornbury is 222 ..