Define event B at least one of the next two babies is a boy

Define event B = {at least one of the next two babies is a boy}. What is the probability of the complement of event B? A) 0.125 B) 0.250 C) 0.375 D) 0.500 What is the probability that at least one of the next three babies is a boy? A) 0.125 B) 0.333 C) 0.750 D) 0.875 Suppose that A and B are two independent events. The probability that event A occurs is 0.4 (i.e., P(A), and that P(B) = 0.2. What is the probability that A does not occur and B also does not occur? A) 0.92 B) 0.40 C) 0.60 D) 0.08 E) 0.48 Consider the following distribution of values for a discrete variable X: What value of U will make this a proper probability distribution? A) 0.1 B) 0.25 C) -0.1 D) 0 E) There is no value for U that will make this a probability distribution of a discrete random variable.

Solution

The other questiosn are dependent on data not in the image. So, attempting the Q6)

6.

The probabilities sum is 1
.2+U+.3+.2+.4 = 1

U = 1-.2-.3-.4-.2 = -.1
U = -.1

But the correct probability can\'t be negative.

E) There is no value for U that will make this a probability distribution of a discrete
random value.