Question: Mrs. Brown paid her utility bills with 3 $50 bills and 2 $10 bills. How much are her utility bills?
Answer: Mrs. Brown's $50 bills amount to $50 x 3 = $150. Her $10 bills amount to $10 x 2 = $20. So Mrs. Brown's utility bills cost $150 + $20 = $170. The answer is 170.

Question: Two-fifths of the seats in an auditorium that holds 500 people are currently taken. It was found that 1/10 of the seats are broken. How many seats are still available?
Answer: 500 / 2 / 5 = 200 seats are already taken. 500 / 1 / 10 = 50 seats are broken. So 200 + 50 = 250 seats are either taken or broken. Therefore, 500 - 250 = 250 seats are still available. The answer is 250.

Question: Exactly two-fifths of NBA players who signed up for a test are aged between 25 and 35 years. If three-eighths of them are older than 35, and a total of 1000 players signed up, how many players are younger than 25 years?
Answer: Two - fifths of 1000 players is (2 / 5) * 1000 = 400 players. Three eights of 1000 players is (3 / 8) * 1000 = 375 players. The total number of players 25 or older is 400 + 375 = 775. The number of players younger than 25 years is 1000 - 775 = 225 players. The answer is 225.

Question: Reggie's father gave him $48. Reggie bought 5 books, each of which cost $2. How much money does Reggie have left?
Answer:
The cost of the books is 5 × $2 = $10. Reggie has $48 − $10 = $38 left. The answer is 38.