Answer:
B
Step-by-step explanation:
hope it helps
Sorry if it's incorrect
Just put the x number for x and solve equation
The set given by the project grade is {1, 2, 3, 4, 5}. If the random variable, X, is the project grade, the mean of the probability distribution is determined by:
Sum = 1 + 2 + 3 + 4 +5
= 15
Mean of the probability distribution is 15/n, where n = 5
= 15/ 5
= 3
X = 7
5 + x can also be written as 5 + 7
5 + 7 = 12