In a textbook maths problem I've got a continuous variable $m$ that could take values from 0 to 100 (inclusive). In the question, the author writes the following:
$0 \leq m < 10$
$10 \leq m < 20$
$20 \leq m < 30$
...
And we are asked to complete the groups and draw a frequency histogram for some data. I'm confused.
If I continue the pattern I will end up with a group that is
$90 \leq m < 100$
But then what would I do with a piece of data that was $m=100$?
One could imagine such a situation if $m$ was the number of marks on a maths exam for example.