HA! "If convenient, use technology to find the probabilities."
Yeah, and "if not convenient to use technology, please proceed in spending enormous amounts of time wracking your brain for abstract mathematical concepts and formulas. Once those formulas have been produced, use entire sheets of paper to complete ridiculously long problems and hope that you didn't make a stupid mistake somewhere in the process. But again, only if you find technology inconvenient."
::goes off to continue using technology in desperate attempt to preserve brain-cells and defend against grey hair::