Question
A student got an average score of certain marks in the
first 16 tests. In the next 4 tests, she scored 76 marks on average. This raised her overall average by 2 marks. What was her average score in the first 16 tests?Solution
Let, average marks in first 16 tests is x So, (16 × x + 4 × 76)/20 = x + 2 Or, 16x + 304 = 20x + 40 Or, 4x = 264 Or, x = 66
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