Recall that a deck of cards consists of 52 total cards. There are four "4" cards, and there are 4 Queen cards.
Part a)
These are mutually exclusive events because drawing a 4 is quite different from drawing a queen.
Part b)
find the probability of drawing a 4 OR a queen.
Since these are mutually exclusive events, their probabilities will ADD:
P (A or B) = P(A) + P(B)
in our case if we call A the event of drawing a "4", we get 4/52
the probability of drawing a queen would also be 4/52
Then, the probabiliti of drawing a 4 or drawing a queen would be:
4/52 + 4/52 = 8/52 = 2/13
Many teachers want the probability in poercent form, so for that we need to actually perform the division and write the percent:
2 / 13 = 0.153846...
so in percent form and rounded to two decimals, this becomes:
15.38%