<PRE><B>Question 821282</B>
Mimi just started her tennis class three weeks ago. On average, she is able to return 15% of her opponent’s serves. If her opponent serves 10 times, please answer the following questions: 
Find the probability that she returns at most 2 of the 10 serves from her opponent.
Binomial Problem with n= 10 and p(return) = 0.15
P(0&lt;= x &lt;=2) = binomcdf(10,0.15,2) = 0.8202
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How many serves is she expected to return? 
u = np = 0.15*10= 1.5
Comment on your question: The 1st question asks for a probability.
The 2nd question asks for a count.  The answer is 1.5, not 2.
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Cheers,
Stan H.
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