Question

four parcels had a weight of 400g. when a fifth parcel was added the mean became 500g. what was the weight of the fifth parcel?

Answer 1

900 g

Explanation:

Here, we want to get the weight of the 5th parcel

Mathematically, the total

is the mean multiplied by the count

the four parcel weighted 400 g averagely

The mean of this is 400(4) = 1,600 g

Adding the 5th parcel, we have an average of 500 g

This means that the total will be;

500(5) = 2,500 g

the difference in weight is the weight of the 5th parcel

That’s 2500-1600 = 900 g