Question
The average marks of 22 students is 64. If x new
students join with an average of 75 marks, the class average increases to 66. Find x.Solution
ATQ, 22 * 64 + x * 75 = (22 + x) * 66 1408 + 75x = (22 + x) * 66 75x – 66x = 1452 – 1408 9x = 44 x = 44 / 9
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