Mr. jenkins is almost 67 years old and is preparing to retire. Over his life he earned an average of $3,750 per month after adju
sting for inflation. The formula for calculating monthly social security benifits is 90% of the first $680 earned, then 32% of the earning over $680. Whata will Mr. Jenkins' monthly benefit be?
Let the number of cards in each group be 2x and 3x. So, 2x + 3x = 120 5x = 120 x = 120 / 5 x = 24 Number of cards in each group is 2x = 2 × 24 = 48 3x = 3 × 24 = 72