56. At the school carnival, Mike will play a game in which he will toss a penny, a nickel, and a dime at the same
time. He will be awarded 3 points for each coin that lands with heads faceup. Let the random variable x
represent the total number of points awarded on any toss of the coins. What is the expected value of x ?

  • F. 1 

  • J. 6

  • K. 9