Question

the mean of 7 number is 42 if one number is excluded then the mean is 39 find the excluded number​

Answer 1

Mean of 7 numbers=42

Total of 7 numbers =7×42 =294

1 number is excluded

a/q

mean of 6 numbers=39

total of 6 numbers=39×6 = 234

Therefore the excluded no.= 294-234

=60 (ans)