Question

a fair coin will be tossed four times. the possible outcomes are shown below.it says “what is the probability that the outcome will be at least two heads (H)?

Answer 1

Explanation

Probability is simply the ratio of

$P=\frac{number\text{ of possible outcomes}}{number\text{ of total outcomes}}$

The number of total outcomes is 16 as given in the image

The number of possible outcomes is the number of having at least 2 heads is shown below

Thus, we have the probability as

$P=\frac{11}{16}$