Hint- Here, we will be using the general formula for probability i.e., Probability of occurrence of an event$ = \dfrac{{{\text{Number of favourable outcomes}}}}{{{\text{Total number of possible outcomes}}}}$ in order to find the required probability.Given that we are tossing four coins and we have to find out the probability of obtaining two heads and two tails.According to general formula for probability of occurrence of an event, we can writeProbability of occurrence of an event$ = \dfrac{{{\text{Number of favourable outcomes}}}}{{{\text{Total number of possible outcomes}}}}$By tossing four coins, the possible outcomes are (H,H,H,H), (T,H,H,H), (H,T,H,H), (H,H,T,H), (H,H,H,T), (T,T,H,H), (T,H,T,H), (T,H,H,T), (H,T,T,H), (H,T,H,T), (H,H,T,T), (T,T,T,H), (T,T,H,T), (T,H,T,T), (H,T,T,T), (T,T,T,T) where H represents occurrence of head while tossing a coin and T represents occurrence of tail while tossing a coin.Therefore, Total number of possible outcomes = 16Here, the favourable event is getting two heads and two tails on tossing four coins.Clearly, the favourable outcomes after tossing four coins are (T,T,H,H), (T,H,T,H), (T,H,H,T), (H,T,T,H), (H,T,H,T) and (H,H,T,T).Therefore, Number of favourable outcomes = 6Probability of obtaining two heads and two tails $ = \dfrac{{\text{6}}}{{{\text{16}}}} = \dfrac{3}{8}$.Hence, the chance that there should be two heads and two tails after tossing four coins is $\dfrac{3}{8}$.Note- In these types of problems, where tossing of n coins is associated we already have a formula for calculating the total number of possible cases that will occur when n coins are tossed. i.e., Total number of possible outcomes when n coins are tossed =${2^{\text{n}}}$ (in this case n=4 that’s why total number of possible outcomes =${2^4} = 16$). Probability is also known as the math of chance. This means the possibility, that deals in the occurrence of a likely affair. The value is deputed from zero to one. In math, Probability has been manifest to estimate how likely affairs are to occur. Basically, probability is the extent to which something is to be expected to occur. Probability To understand probability more accurately, let us understand an example of rolling a dice, the possible outcomes are – 1, 2, 3, 4, 5, and 6. The probability of happening any of the likely affairs is 1/6. As the possibility of happening any of the affairs is the same so there is an equal possibility of happening any favorable affair, in this case, it is either of two 1/6 or 50/3. Formula of Probability
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Similar QuestionsQuestion 1: If four coins are tossed, what is the probability of occurring neither 4 heads nor 4 tails? Solution:
Question 2: If four coins are tossed, find the possibility that there should be two heads and two tails. Solution:
Question 3: If you toss a coin 4 times, what is the probability of getting all heads? Solution:
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Is there a way to solve the problem considering that the probability of getting a head is 1/2 and then calculating $.5^4$ and multiplying $.5^4$ by 4 as there are 4 ways that this could occur?
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