Three unbiased coins are tossed. What is the probability of getting at most two heads?
A) 3/4B) 7/8C) 1/2D) 1/4
Three unbiased coins are tossed. what is the probability of getting at most two heads
Answer: B) 7/8
Explanation:
Here S = {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}
Let E = event of getting at most two heads.
Then E = {TTT, TTH, THT, HTT, THH, HTH, HHT}.
P(E) =n(E)/n(S)=7/8.
Subject: Probability – Quantitative Aptitude – Arithmetic Ability