A coin is thrown 3 times. What is the probability that atleast one head is obtained?
Answer Details
To find the probability of obtaining at least one head when a coin is thrown 3 times, we need to consider the possible outcomes.
First, let's determine the total number of possible outcomes when a coin is thrown 3 times. For each coin toss, there are 2 possibilities: either a head or a tail. Since we are tossing the coin 3 times, the total number of outcomes is 2 * 2 * 2 = 8.
Now, let's calculate the number of outcomes in which at least one head is obtained. To have at least one head, we can have the following outcomes: - 1 head and 2 tails: HHT, HTH, or THH - 2 heads and 1 tail: HHT, HTH, or THH - 3 heads: HHH
So, there are a total of 7 outcomes in which at least one head is obtained.
Therefore, the probability of obtaining at least one head when a coin is thrown 3 times is 7/8.
The correct answer is None of the above (since none of the options match 7/8).