A bag contains only two types of coins: 10 cent coins or 1 dollar coin

A bag contains only two types of coins: 10 cent coins or 1 dollar coins and number of 10 cent coins does not exceed the number of 1 dollar coins. How many 10 cent coins are there in the bag? (1) The total amount of money in the bag is $16.50. (2) If five 10-cent coins are removed and replaced (…)