Final answer:
Mary received $2.40
Step-by-step explanation:
To find out how much Mary received, we need to use the given ratio of Joe's money to Mary's money, which is 4:6. We know that Joe received $1.60, so we can set up a proportion to find out how much Mary received. The proportion would be 4/6 = $1.60/X, where X is the amount Mary received. We can cross-multiply and solve for X: 4X = 6 * $1.60. Dividing both sides by 4 gives us X = ($1.60 * 6)/4 = $2.40.