Kia has 10 coins in a bag. t here are three $1 coins and seven 50 pence coins. kia takes at random 3 coins from the bag. workout the probability she takes out exactly $2.50

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative