Sage-Tips

What is the probability of getting at least one head in 3 tosses of a coin?

7/8
Summary: A coin is tossed 3 times. The probability of getting at least one head is 7/8.

What is the probability of getting head when a coin is tossed 3 times?

0.125
Answer: If you flip a coin 3 times the probability of getting 3 heads is 0.125.

What probability is at least?

To find the probability of at least one of something, calculate the probability of none and then subtract that result from 1. That is, P(at least one) = 1 – P(none). Topford supplies X-Data DVDs in lots of 50, and they have a reported defect rate of 0.5\% so the probability of a disk being defective is 0.005.

What is the probability of head coin?

The probability of getting heads on the toss of a coin is 0.5. If we consider all possible outcomes of the toss of two coins as shown, there is only one outcome of the four in which both coins have come up heads, so the probability of getting heads on both coins is 0.25. The second useful rule is the Sum Rule.

What is the probability of getting a head when a coin is tossed 4 times?

1/16
Example: In counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: HTTT, THTT, TTHT, or TTTH. Each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.

What is the probability of a coin being tossed three times?

So its not relevant in calculating the probability. It will still be (1)no heads, (2)one head, (3)two heads or (4) three heads in every three tosses. There are no other possibilities available apart from those four. Originally Answered: A fair coin is tossed three times in succession.

What is the probability of getting at least two heads?

Remember that the probability of either heads or tails is equal, and that fact coupled with the symmetric distribution of outcomes, and you can deduce that P ( 2: 1) + P ( 3: 0) = P ( 0: 3) + P ( 1: 2). Since these are the only four options we may conclude that the probability of getting at least two heads when tossing three fair coins is 1/2.

How many times is a coin tossed in a Bernoulli trial?

Assume that the coin in balanced. Then the Bernoulli trials each have p = P (head) = 1/2 and q = P (tail) = 1 – p = 1/2. where k = 1, n = 3, and p and q as given before. Then Originally Answered: A coin is tossed 3 times.

What is the probability of 3 tails appearing in 3 tosses?

Probability as requested = 7/8. The probability that 3 tails appear in 3 tosses is (1/2)^3, therefore the required probability is 1- (1/2)^3=0.875=87.5\%. Proof: head appears at least once in three tosses if it appears either one time or two times or three times.

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