Question

Find the expected number of boys in a family of four children.

a) 1
b) 2
c) 2.5
d) 3

Answer 1

To find the expected number of boys in a family of four children, we need to consider the probability of having different numbers of boys.

Step-by-step explanation:

To find the expected number of boys in a family of four children, we need to consider the probability of having different numbers of boys.

There are four possible outcomes: 0 boys, 1 boy, 2 boys, and 3 boys.

To calculate the expected value, we multiply each outcome by its probability and add them together:

Expected value = (0 * P(0 boys)) + (1 * P(1 boy)) + (2 * P(2 boys)) + (3 * P(3 boys))

Since the question does not provide the probabilities for each outcome, it is not possible to determine the expected number of boys without this information.