A money box contains four $2 coins, seven $1

coins, twelve 50 cent coins and twenty two 20

cent coins. Christie chooses a coin at random.

Find the probability she chooses a coin that

is worth at most $1.

Find the probability she chooses a coin

that is either a $1 or a $2 coin.

Find the probability she chooses a coin

that is worth at least 50 cents.

Part #1: 13/15

Part #2: 11/45

Part #3: 23/45

Step-by-step explanation:

Part #1: So add the total amount of coins: 4 + 7 + 12 + 22 = 45

Since the only coins that are at most $1 are: The $1 coins, 50 cent coins, and the 20 cent coins. That is a total of 7 + 12 + 20 = 39

39/45

13/15

Answer: 13/15

Part #2: Since the only coins that are $1 or $2: The $1 coins and the $2 coins. That is a total of 4 + 7 = 11

11/45

Answer: 11/45

Part #3: Since the only coins that are at least 50 cents: The $1 coins and the $2 coins and the 50 cent coins. That is a total of 4 + 7 + 12 = 23

23/45

Answer: 23/45