2. Jimmy has a total of 52 coins in his piggy bank. He has a combination of quarters, nickels, and dimes, but no pennies. Jimmy has five fewer nickels than dimes and has
three more quarters than dimes.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

isi

step-by-step explanation:

use that smart brain

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.