(i) Exactly two heads Show Possible outcome of tossing three coins are: HTT, HHT, HHH, HTH, TTT, TTH, THT, THH Number of outcomes of exactly two heads are: 3 Probability of getting exactly two heads is = Total numbers/Total number of outcomes = 3/8 ∴ Probability of getting exactly two heads is 3/8 (ii) At least two heads Possible outcome of tossing three coins are: HTT, HHT, HHH, HTH, TTT, TTH, THT, THH Number of outcomes of at least two heads are: 4 Probability of getting at least two heads is = Total numbers/Total number of outcomes = 4/8 = 1/2 ∴ Probability of getting at least two heads is 1/2 (iii) At least one head and one tail Possible outcome of tossing three coins are: HTT, HHT, HHH, HTH, TTT, TTH, THT, THH Number of outcomes of at least one head and one tail are: 6 Probability of getting at least one head and one tail is = Total numbers/Total number of outcomes = 6/8 = 3/4 ∴ Probability of getting at least one head and one tail is 3/4 (iv) No tails Possible outcome of tossing three coins are: HTT, HHT, HHH, HTH, TTT, TTH, THT, THH Number of outcomes of no tails are: 1 Probability of getting no tails is = Total numbers/Total number of outcomes = 1/8 ∴ Probability of getting no tails is 1/8 Want to join the conversation?
What is the probability of getting at least 2 heads in 5 coin tosses?∴ Five coins are tossed the probability of getting two heads is 5/16.
What is the probability of getting at least 2 heads?Answer: If you flip a coin 3 times, the probability of getting at least 2 heads is 1/2. Let's look into the possible outcomes.
What is the probability of flipping a coin 7 times and getting at least 5 heads?Hence, the probability of flipping a coin 7 times and getting heads 5 times is 21/128.
What is the probability of getting at least one head in 5 coin toss?With 5 coins to flip you just times 16 by 2 and then minus 1, so it would result with a 31 in 32 chance of getting at least one heads.
|