Question
The average height of a group of 40 students is 130
The average height of a group of 40 students is 130
cm. After replacing 2 students of height (x – 7) and (x + 2) cm respectively, with a student of height (x – 5) cm, the average height of the group becomes (x – 40)
cm. What is the value of 'x'?
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