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a jar contains 3 pennies, 8 nickels and 7 dimes. a child selects 2 coins at...

a jar contains 3 pennies, 8 nickels and 7 dimes. a child selects 2 coins at random without replacement from the jar. let x represents the amount in cent of the selected coins. find the probability x=10, x=11 find the expected value of x

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