Below is the probability distribution for random variable x.What is the probability of at least a score of 2 in this distribution?
A).18
B).42
C).60
D).82

Question

Below is the probability distribution for random variable x.What is the probability of at least a score of 2 in this distribution? 
A).18 
B).42 
C).60 
D).82

Quizplus · Accepted Answer

To calculate the probability of at least a score of 2, we need to add the probabilities for x = 2, x = 3, and x = 4, because these are the only outcomes that have a score of 2 or higher.

P(at least 2) = P(X = 2) + P(X = 3) + P(X = 4) 
              = 0.20 + 0.35 + 0.27 
              = 0.82

Therefore, the probability of at least a score of 2 in this distribution is 0.82, which corresponds to option D).

Below Is the Probability Distribution for Random Variable X