15. A purse contains 3 nickels, 2 dimes, and one quarter. Two coins are selected simultaneously and at random, and the random variable X is defined to be the total value of the coins. Find EXI. a) 224 b) 184 c) 20¢ d) 20.5g e) none of the others

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A: Given:  S=aywz  is a non-invertible matrix.λ1=5               One of the eigen…