Q. An organization uses 85 circuit boards a day in manufacturing process. The person who orders the boards follow this rule: Order when the amount on hand drops to 625 boards. Orders are delivered approximately six days after being placed. The delivery time is normal with a mean of 6 days also standard deviation of 1.1 days. Illustrate what is the probability which the supply of circuit boards will be exhausted before an order is received if boards were ordered when the amount drops to 625 boards.