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26 Oct 2021
Given information
A ballet instructor is interested to know what percentage of each year’s class will be continued on to the next so that she can plan what classes to offer. Over the years, she has established the following probability distribution where
denotes the number of years a student will study ballet with the teacher
denotes the probability of studying for those years.
Step-by-step explanation
Step 1.
As we know, the probabilities of mutually exclusive events can be added. Mutually exclusive events are like that if one event happens then others will not happen.
For can only take value 1 or 2 or 3. So, these probabilities can be added. i.e.,
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