Question

In an experiment there are exactly three elementary events. The probabilities of two of them are 2/9 and 3/9 and respectively. What is the probability of the third elementary event?
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Answer 1

Answer:

4/9

Step-by-step explanation:

3 elementary events = 1 whole event

=> Probability of 3 elementary events = 1

Let probability of 3rd elementary events be x.

2/9 + 3/9 + x = 1

=> 5/9 + x = 1

∴ x = 1 - 5/9 => 9/9 - 5/9 => 4/9