A ballet instructor is interested in knowing what percent of each year's class will continue on to the next, so that she can plan what classes to offer. Over the years, she has established the following probability distribution. • Let X = the number of years a student will study ballet with the teacher. Let P(x) = the probability that a student will study ballet x years. P(x) x*P(x) 1 0.10 2 0.10 0.10 4 0.30 6. 0.20 7 0.05 On average, how many years would you expect a child to study ballet with this teacher? (Enter an exact number as an integer, fraction, or decimal.) yr

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A ballet instructor is interested in knowing what percent of each year's class will continue on to the next, so that she can plan
what classes to offer. Over the years, she has established the following probability distribution.
• Let X = the number of years a student will study ballet with the teacher.
• Let P(x) = the probability that a student will study ballet x years.
P(x)
x*P(x)
1
0.10
0.10
0.10
4
0.30
0.20
0.05
On average, how many years would you expect a child to study ballet with this teacher? (Enter an exact number as an integer,
fraction, or decimal.)
yr
Transcribed Image Text:A ballet instructor is interested in knowing what percent of each year's class will continue on to the next, so that she can plan what classes to offer. Over the years, she has established the following probability distribution. • Let X = the number of years a student will study ballet with the teacher. • Let P(x) = the probability that a student will study ballet x years. P(x) x*P(x) 1 0.10 0.10 0.10 4 0.30 0.20 0.05 On average, how many years would you expect a child to study ballet with this teacher? (Enter an exact number as an integer, fraction, or decimal.) yr
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