Question

what is the probability that a card drawn randomly from a standard deck of 52 cards is a black seven?

Answer 1

In a standard deck of 52 cards, there is 4 cards "seven", 2 of them are red and 2 are black.

So, from the 52 cards, only 2 are black seven. Thus, the probability will be the 2 we want to draw over all the possibilities, that is, 52:

`(2)/(52)=(1)/(26)\approx0.03846=38.46\%`