Asked in Probability
Whats the probability of getting at most one heads when two fair coins are tossed?
When two fair coins are tossed, you have the following possible outcomes:
HH, HT, TH, TT.
So, at most implies that you get either i) zero heads or ii) one head.
From the possible outcomes we see that 3 times we satisify the outcome.
Thus, probability of at most one head is 3/4.