Three unbiased coins are tossed simultaneously. Find the probability of getting exactly 2 heads.
Answer:
38
- When 3 coins are tossed simultaneously, all the possible outcomes are
HHH,HHT,HTH,THH,HTT,THT,TTH, and TTT.
So, total number of possible outcomes = 8. - Let E be the event of getting exactly 2 heads.
The favourable outcomes are HHT,HTH, and THH.
Number of favouable outcomes = 3 ∴ P( getting exactly 2 heads )=P(E)= Number of favourable outcomes Total number of outcomes =38. Thus, the probability of getting exactly 2 heads = 38