Felicia has a stack of 10 cards. Each card is labeled with a number in the range 1 through 10 and no two cards have the same number. She picks three cards at random from the stack and adds the numbers on the three cards. What is the expected value of the sum?

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.4: Expected Value
Problem 13E: Roulette An American roulette wheel has 38 slots. Two slots are numbered 0 and 00, and the rest are...
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Felicia has a stack of 10 cards. Each card is labeled with a number in the range 1 through 10 and no two cards have the same number. She picks three cards at random from the stack and adds the numbers on the three cards. What is the expected value of the sum?

 

 

Felicia has a stack of 10 cards. Each card is labeled with a number in the range 1 through 10 and no two
cards have the same number. She picks three cards at random from the stack and adds the numbers on the
three cards. What is the expected value of the sum?
15
18
10.5
16.5
Transcribed Image Text:Felicia has a stack of 10 cards. Each card is labeled with a number in the range 1 through 10 and no two cards have the same number. She picks three cards at random from the stack and adds the numbers on the three cards. What is the expected value of the sum? 15 18 10.5 16.5
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