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Sum of weights of 25 student = 25*60 = 1500 kg Sum of the weights of (25+x)(60+2x-7) = {(25+x)(53+2x)} kg As per the question (25+x)(53+2x)-1500 = 390 (25+x)(53+2x) = 1890 2x2+103x-565=0 X= 5 or (-113/2) Student since the number of student cannot be negative. So our answer will be 5
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II. Some sitars ar...
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