The table to the right lists probabilities for the corresponding numbers of girl
ID: 3128336 • Letter: T
Question
The table to the right lists probabilities for the corresponding numbers of girls in three births. What is the random variable, what are its possible values, and are its values numerical?
Number of girls x
P(x)
0
0.125
1
0.375
2
0.375
3
0.125
Choose the correct answer below.
A.
The random variable is P(x), which is the probability of a number of girls in three births. The possible values of P(x) are 0.125 and 0.375. The values of the random value P(x) are not numerical.
B.
The random variable is x, which is the number of girls in three births. The possible values of x are 0, 1, 2, and 3. The values of the random value x are not numerical.
C.
The random variable is x, which is the number of girls in three births. The possible values of x are 0, 1, 2, and 3. The values of the random value x are numerical.
D.
The random variable is P(x), which is the probability of a number of girls in three births. The possible values of P(x) are 0.125 and 0.375. The values of the random value P(x) are numerical.
The table to the right lists probabilities for the corresponding numbers of girls in three births. What is the random variable, what are its possible values, and are its values numerical?
Number of girls x
P(x)
0
0.125
1
0.375
2
0.375
3
0.125
Explanation / Answer
Solution:
Option C
The variable x is a random variable because its values depend on chance. The possible values of x are 0, 1, 2, and 3. Because these values are numbers, x is a numerical variable.
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