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    Question

    A coder solved problems at an average of x problems per

    day for the first 25 days. In the next 5 days, they solved at an average of 64 problems per day, which increased the overall average by 4. What was the average for the first 25 days?
    A 40 Correct Answer Incorrect Answer
    B 44 Correct Answer Incorrect Answer
    C 36 Correct Answer Incorrect Answer
    D 48 Correct Answer Incorrect Answer

    Solution

    Let, average problems per day in first 25 days is x So, (25 × x + 5 × 64)/30 = x + 4 Or, 25x + 320 = 30x + 120 Or, 5x = 200 Or, x = 40

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