A wallet containing 2 five-dollar bills, 9 ten-dollar bills, and 5 twenty-dollar bills is found and returned to its owner. The wallet's owner. The wallet's owner will reward the finder with 1 bill drawn randomly from the wallet. What is the probability that the bill drawn will be a twenty-dollar bill?

If the probability that John will buy a certain product is (3)/(5) , that Bill will buy that product is (2)/(3) . And that Sue will buy that product is (1)/(4) , and if their decisions to buy are inepandent , what is the probability that at least of them will buy the product ?

Coloured bills are distributed in three bags as shown in the following table: Bag Colour of the ball Black White Red I 1 2 3 II 2 4 1 III 4 5 3 A bag is selected at random and then two balls are randomly drawn from the selected bag. They happen to be black and red. What is the probability that they came from bag I?

Coloured bills are distributed in three bags as shown in the following table: Bag Colour of the ball Black White Red I 1 2 3 II 2 4 1 III 4 5 3 A bag is selected at random and then two balls are randomly drawn from the selected bag. They happen to be black and red. What is the probability that they came from bag I?