Two cards are dealt at random from a standard deck of 52 cards. What is the probability that the first card is a $\diamondsuit$ and the second card is an ace?
The probability is 1/4*1/12 = 1/48.
Hmmmm....not so sure about that ! What if the first card drawn is the ace of diamonds?
https://web2.0calc.com/questions/i-don-t-get-it_6