Question

Events a and b are mutually exclusive if p(a)= 0.1 and p(b)= 0.2. What is the probability of event a or event b?

1) 0.1
2) 0.2
3) 0.3
4) 0.4

Answer 1

The probability of event a or event b is 0.3.

Step-by-step explanation:

Two events, a and b, are mutually exclusive if the probability of both events happening at the same time is zero. The probability of event a is 0.1 and the probability of event b is 0.2. To find the probability of event a or event b, we can use the formula P(a OR b) = P(a) + P(b) because the events are mutually exclusive.

P(a OR b) = P(a) + P(b) = 0.1 + 0.2 = 0.3.

Therefore, the probability of event a or event b is 0.3.