the mean of weight per student in a group of 7 student is 55kg . the individual weights of 6 of them in kg are 52, 54, 55, 53, 56, 54 . find the weight of the 7th student.
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60.......................add 3 to first,add 1 to 2nd,add 0 to 4the,add 2 to fifth,subtract 1 to 6the,,so 7the weight is 55+5=60
Anonymous:
can you EXPLAIN it
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