Math

1. A card is selected from a deck. Find the following probabilities.

a. P (a red card)

b. P (a face card)

c. P (a jack and a spade)

2. A survey of athletes revealed that for their minor aches and pains, 30 used aspirin, 50 used ibuprofen, and 15 used both. No athletes reported using neither. How many athletes were surveyed?

3. You invested $10,000 into two accounts: one that has simple 3% interest, the other with 2.5% interest. If your total interest payment after one year was $283.50, how much was in each account after the year passed?