SOLUTION: suppose 9 quarters, 7 dimes, 6 nickels, and 8 pennies are in a box. one coin is selected at random. what is the expected value of this experiment?​

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Question 1138211: suppose 9 quarters, 7 dimes, 6 nickels, and 8 pennies are in a box. one coin is selected at random. what is the expected value of this experiment?​
Answer by ikleyn(52877)   (Show Source): You can put this solution on YOUR website!
.
9 + 7 + 6 + 8 = 30 coins, in all.


The probability to randomly select a quarter is  ;

The probability to randomly select a dime    is  ;


    . . . .  and so on  . . . . 


The expected value of the experiment is


 =  =  =  = 11.1 cents.    ANSWER


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