As you get older your brain develops as you do so when you’re taught math your brain is developing a slightly slower pace than it should be for example if you have a teacher who doesn’t really teach a lot it’s really going to slow down the process of learning
P(P then C)=(7/10)(3/12)
P(PthenC)=21/120
P(PthenC)=7/40
To write the problem out as an equation, let 'n' equal your number.
(15 x 1/n) - 3n