Question

The mean weight of 8 students is 45.5 kg. Two more students having weights 41.7 kg
and 53.3 kg join the group. What is the new mean weight?
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Answer 1

Answer:45.9

Step-by-step explanation:let the initial total weight be x

X/8=45.5

X=364

Final weight = 364+53.3+41.7

=459

Mean=459/10

=45.9

Answer 2

Step-by-step explanation:

The mean weight of 8 students is 45.5 kg

Total weight of 8 students is= 45.5×8=364 kg

Now, two students having weight 41.7 kg and 53.3 kg join the group.

Now the total weight of 10 students become=(364+41.7+53.3)=459kg

So the mean weight of 10 students= 459/10=45.9