Suppose that X and Y are discrete random variables taking the values 1 and 2. Suppose further that P(X = 1) = . P(Y 1|X 1) = , and P(X = 2, Y = 2) = . What is the value of E[XY]a %3D %3D Select one: 24 a. 15 26 Ob. 15 Ob. 28 Oc. Od 15

At inventory time, 435 pounds of magnet wire for winding motors is available. In ten successive days, 15 pounds, 6 pounds, 24 pounds, 12 pounds, 3 pounds, 8 pounds, 17 pounds, 32 pounds, 16 pounds, and 13 pounds of wire are taken out of stock. How many pounds are left?

You go to the doctor and he gives you 16 milligrams of radioactive dye. After 24 minutes, 5.75 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? Give your answer to the nearest minute. You will spend______ minutes at the doctor's office.

An automotive researcher wanted to estimate the difference in distance required to come to a complete stop while traveling 40 miles per hour on wet versus dry pavement. Because car type plays a role, the researcher used eight different cars with the same driver and the same tires.  The braking distance (in feet) on both wet and dry pavement is shown in the table. Test to determine whether it takes longer to brake on wet pavement than dry.      Car number 1 2 3 4 5 6 7 8 Wet braking distance 106.9 100.9 108.8 111.8 105.0 105.6 110.6 107.9 Dry braking distance 71.8 68.8 74.1 73.4 75.9 75.2 75.7 81.0

You go to the doctor and he gives you 15 milligrams of radioactive dye. After 24 minutes, 5.5 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? Give your answer to the nearest minute. You will spend minutes at the doctor's office.

About 1/3 of Samuel’s paycheck goes to housing, 1/6 goes to utility bills, 1/8 goes for his car, and 1/5 goes for food. How much of his paycheck is left for entertainment?

Can you write this all out? So I can understand the steps clearly.

Mila invested $6,700 and put it in two accounts. She put some in a money market account that earned 1 1/2 % simple interest and she put the rest in a certificate of deposit (CD) that earned 2 3/4% simpleinterest. At the end of the first year she earned a total of $149.25 in interest. How much did she depositin each account?

Susan's bioloy class begins with 1225 students. If 5/7 will finish the course and 2/25 of those get a passon grade, how many students will pass Susan's bioloy class this term?

What was Charlie's mistake?