Question 1155723
in a community of 500 people,the 75th percentile age is 65 years<pre> 
That means that 75% of the 500 are younger than 65.

Since 75% of 500 = (0.75)(500) = 375, 375 people are younger than 65</pre>
while the 25th percentile age is 15 years.<pre> 
That means that 25% of the 500 are younger than 15.

Since 25% of 500 = (0.25)(500) = 375, 125 people are younger than 15.</pre>
How many of the people are between 15 and 65 years.<pre>
We just take away the 125 that are younger than 15 from the number that
are younger than 65:

375 - 125 = 250 people between 15 and 65 years.

Edwin</pre>