What is the quickest way to do probability

2 answers

There is no general answer to this...it depends on what one wants to figure out, what is given, how many variables are involved.
http://www.corestandards.org/read-the-standards/

Be sure to read the actual standards for your child at his/her correct grade level. They are appropriate measures of what each child should have mastered by the time s/he leaves any particular grade in school.

The problem, as I understand from current teachers, is not with the standards, but with the texts and tests that publishers have put on the market since about 2007 or so.