When a student weighing 45 dgs left a class , the average weight of the remaining 59 students increased by 200g . What is the average weight of the remaining 59 students ?

When a student weighing 45 dgs left a class , the average weight of the remaining 59 students increased by 200g . What is the average weight of the remaining 59 students ? Correct Answer 57 kgs

Let, Average weight of 59 students = x kg Total weight of 59 students = 59x Total weight of 60 students = (59x + 45) Average weight of 60 students = ( 59x + 45)/60 x - ( 59x - 45)/60 = 200/1000 ( 60x - 59x - 45) /60 = 1/5 5x - 225 = 60 x = 285 /5 = 57kgs
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