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Summary: A coin is tossed 3 times. The probability of getting at least one head is **7/8**.(iii) Let E_{3} denotes the event of getting atleast one head. Hence the required probability is **7/8**.Answer: If you flip a coin 3 times the probability of getting 3 heads is **0.125**. When you flip a coin 3 times, then all the possibe 8 outcomes are HHH, THH, HTH, HHT, TTH, THT, HTT, TTT. Explanation: Possible outcomes are HHH, THH, HTH, HHT, TTH, THT, HTT, TTT.

## When 3 coins are tossed what is the probability of getting at least one head?

(iii) Let E_{3} denotes the event of getting atleast one head. Hence the required probability is **7/8**.

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

Answer: If you flip a coin 3 times the probability of getting 3 heads is **0.125**. When you flip a coin 3 times, then all the possibe 8 outcomes are HHH, THH, HTH, HHT, TTH, THT, HTT, TTT. Explanation: Possible outcomes are HHH, THH, HTH, HHT, TTH, THT, HTT, TTT.

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## What is the meaning of at least one head?

At least one head means **the number of head is greater than or equal to 1**. For example:- Three coins are tossed together.

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## What is the probability of obtaining heads at least once?

You state flipping a coin “two times”, in which case, there are four possible outcomes: TT, TH, HT, HH, with probability **3/4** that a head will appear at least once.

## When a coin is tossed 3 times find the probability of getting exactly one tail?

So you have a **7/8** chance that you will have at least one tails.

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### At Least One… – NRICH

If you flip a coin 3 times the probability of getting at least one heads is 7 in 8 by reading the table. This table also works the opposite way, the chances …

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0.88 is the probability of getting 1 Head in 3 tosses. Exactly 1 head in 3 Coin Flips. The ratio of successful events A = 3 to total number …

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= 3 (as HH, HT, TH are having at least one head). So, by definition, P(F) = 34 …

## How many outcomes have at least one head?

N=1: There are **4** possible outcomes which will have only one coin heads. It may be that the 1st coin is heads, and all others are tails; or it may be that the 2nd coin is heads, and all others are tails; or it may be that the 3rd (or the 4th) coin is heads, and all others are tails.

## When two coins are tossed what is the probability of at least one head?

Expert-verified answer

Probability of getting at least 1 head. Let E be event of getting at least 1 head. Then, E = {(HH , HT, TH} Therefore, n(E) = 3. Therefore, P(getting at least 1 head) = P(E) = n(E)/n(S) = **3/4**.

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