Question

Find P(Not a 2).

X 1 2 3 4
P(X) 0.30 0.40 0.15 0.15
A. 0.70
B. 0.60
C. 0.30
D. 0.40

Answer 1

B. 0.60

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Answer 2

Option B is correct.

Explanation:

We have been given the different probabilities at different point we need to find the probability of not of 2

We know that sum of probabilities is 1

`P(a_2)+P(not a_2)=1`

Here, the probability that is P(a 2)=0.40

Hence, the required probability is 1-0.40=0.60

Therefore, option B is correct.