- A game show host has developed a new game called "Grab All Can." Here's how it works: a contestant reaches his dominant hand (i.e. right hand for right-handed people) into a jar of $10 bills and grabs as many as he can in one handful. Then he does the same thing with his non-dominant hand in a jar of $20 bills. Research with many volunteers has determined that the mean number of $10 bills drawn is 68 with a standard deviation of 9.5, and the mean number of $20 dollar bills is 58, with a standard deviation of 7.8.

(a) If D-the amount of money, in dollars, that a randomly-selected contestant grabs from the "$10 grab,"
find the mean and standard deviation of D.

Please help. I’m so confused