Question

The mean of the given data is 84. If 6 is added to each observation and then divided then by 9, the new mean is?

Answer 1

if 6 is added to each observation mean will increase by 6 and when it is divided by nine mean also wil be divided by 9

therefore ,
new mean = (old mean +6)÷9
=(84+6)÷9=90÷9
=10