Que 6: When a student weighing 45 kg left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students? 1. 57 kg 2. 56.8 kg 3. 58.2 kg 4. 52.2 kg Ans: Choice (1) Can Any one explain it?

CAT Question

Let x= Total weight of 59 students
y= Average weight of 60 students

(x+45)/60 = y ---- equation 1
x/59 = y+0.2 ---- equation 2

Solving both equations we get y= 56.8
Average weight of 59 students = y+0.2 = 56.8 + 0.2 = 57 kg

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