Question

The mean weight of a class of 34 students is 46.5 kg. If the weight of the teacher is included, the mean rises by 500 g.
Find the weight of the teacher.

Answer 1

Now Average Weight Of Class = 46.5 kg

Now Average Weight = Total Weight/Number

46.5 = Total Weight/34

Total Weight = 46.5*34 = 1581

Now If Teacher Is Included

Let Weight Of Techer Be x kg

Now

Total Weight = 1581+x

Now Number = 35

Average Weight = 46.5+0.5 = 47

So

1581+x/35 = 47

1581+x = 1645

x = 64

So Weight Of Teacher Is 64 Kg