An investor invested some money in 2 separate schemes: A and B. Scheme A will yield 30% of the capital within a year, and scheme B will yield 50% of the capital within a year. If he invested $300 in scheme A and $200 in B, how much more money will he have in scheme A than in B after a year, provided he does not withdraw anything? Give the rationale and then the answer.
Let's think step by step. After a year, scheme A will yield 30% of his capital which is (30 / 100) * $300 = $90. In addition to his capital, he will have $90 + $300 = $390 in scheme A. After a year, scheme B will yield 50% of his capital which is (50 / 100) * $200 = $100. In addition to his capital, he will have $100 + $200 = $300 in scheme B. After a year, he will have $390 - $300 = $90 in scheme A more than in scheme B.. The answer is: 90.

Kelly has 8 chickens that lay 3 eggs each per day. If Kelly sells these eggs for $5 a dozen. How much money will she make in 4 weeks if she sells all her eggs? Give the rationale and then the answer.
Let's think step by step. Each chicken lays 7 * 3 = 21 eggs a week. Each week all the chickens lay 21 * 8 = 168 eggs. In 4 weeks all the chickens lay 168 * 4 = 672 eggs. 672 eggs equal 672 / 12 = 56 dozens. Kelly would make 56 * 5 = 280 dollars.. The answer is: 280.

Carmen needs $7 more to have twice the amount of money that Jethro has. Meanwhile, Patricia has $60, which is 3 times as much as Jethro. What is the sum of all their money? Give the rationale and then the answer.
Let's think step by step. Jethro has 60 / 3 = $20. Twice of what Jethro has is $20 x 2 = $40. Carmen has $40 - 7 = $33. The sum of all their money is $60 + $20 + $33 = $113.. The answer is: 113.