Source: Extra Practice

A bus started with 60 passengers. At the first stop, 15 passengers got off and 7 passengers got on. At the second stop, 10 passengers got off and 12 passengers got on. Which expression correctly calculates the final number of passengers and what is the result?

Options

Option A is correct

Expression: 60−15+7−10+1260 - 15 + 7 - 10 + 12; Result: 5454

Option B

Expression: 60+15−7−10+1260 + 15 - 7 - 10 + 12; Result: 7070

Option C

Expression: 60−15−7+10−1260 - 15 - 7 + 10 - 12; Result: 3636

Option D

Expression: 60+15+7−10−1260 + 15 + 7 - 10 - 12; Result: 6060

Explanation

Let's track the changes in the number of passengers:

  • Started with: 6060
  • At first stop: 15 got off (−15-15), 7 got on (+7+7). Current passengers: 60−15+760 - 15 + 7
  • At second stop: 10 got off (−10-10), 12 got on (+12+12). Final passengers: 60−15+7−10+1260 - 15 + 7 - 10 + 12 This matches the expression in option A. Now, let's calculate the result: 60−15=4560 - 15 = 45 45+7=5245 + 7 = 52 52−10=4252 - 10 = 42 42+12=5442 + 12 = 54 The final number of passengers is 5454. Therefore, option A is correct as both the expression and the result are accurate. The other options have incorrect expressions or incorrect calculations based on the given information.