noname1234
New member
- Joined
- Apr 1, 2006
- Messages
- 12
1. The probablity that a person with certain symptoms has hepatitis is 0.82. A blood test gives positive results for 89% of those who have the disease and 6% of those without th disease. What is the probablity that a person with the symptoms who reacts positively to the test has hepatitis?
2. In a state lottery, the player buys a ticket for $2.00 and chooses any 3-digit number from 000 to 999. The wininng number receives $500. Find the expected winnings.
thank you!!!!
2. In a state lottery, the player buys a ticket for $2.00 and chooses any 3-digit number from 000 to 999. The wininng number receives $500. Find the expected winnings.
thank you!!!!