A counter-example to the given conclusion is the difference between the numbers 15 and 25, where both are positive, but the difference gives a negative result.
How to find the counter-example?
Here we are shown some differences between positive numbers:
7 - 3 = 4
8 - 5 = 3
9 - 8 = 1
And the conclusion is:
"The difference of two positive numbers is always positive".
To find a counter-example we just need to find two positive numbers such that the difference between these two positive numbers gives a negative number as a result.
An example of that can be the numbers 15 and 25, if we take the difference we will get:
15 - 25 = -10
Here we can see that the difference between two positive numbers gives a negative number as an outcome, so this is our counter-example.
If you want to learn more about counter-examples:
https://brainly.com/question/1581078
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