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      Question

      In a batch of 45 students, the

      average programming speed in Python is 80 lines per hour, but after one student left and 8 new students joined, the average programming speed became 79.6 lines per hour. What is the programming speed of a student who codes 6 lines per hour faster than the student who left, if the total programming speed of the eight new students is 620 lines per hour?
      A 86.6 lines per hour Correct Answer Incorrect Answer
      B 58.2 lines per hour Correct Answer Incorrect Answer
      C 78.4 lines per hour Correct Answer Incorrect Answer
      D 50.5 lines per hour Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Total programming speed of batch = 45 * 80 = 3600 3600 - x + 620 = 79.6 * 52 4220 - x = 4139.2 x = 80.8 Required programming speed = 80.8 + 6 = 86.8 lines per hour

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