Question

the mean of 31 results is 60 if the mean of the first 16 results is 58 and that of the last 16 results is 62 finf the 16th results

Answer 1

Mean of 31 terms=60

Thus their total =31×60=1860

Mean of 1st 16=58

Their total=16×58=928

Mean of last 16=62

Their total=16×62=992

928

+992

----------

1920

In this counting 16th term came 2 times...

Thus 16th term=

1920-1860

=60

16th term is 60

Happy to help! :-)

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Answer 2

mean of 31 result=60
mean of first 16 terms=58
sum of first 16 terms=16*58=928
mean of last 16 terms=62
sum of last 16 terms=16*62=992
Sum of the above=992+928
=1920
sum of all the terms=31*60=1860
difference=1920-1860
=60
16th term=60