<span>Niko Bought 4 stamps each week for 3 weeks. He wants to put 6stamps on each page of his album. How many pages will niko use. 2</span>
4x3=12
12/6=2
When the probability of an event is = 1 that means it's no longer a probability but a certainty, an assertion instead.
If today is Thursday, what is the probability tat tomorrow will be Friday?
It's equal to 1 since certainly tomorrow will be Friday
However In noticed that your problem is incomplete, hence we can't answer your last question