1

Question

A sequence consists of 7 terms arranged in descending order. Then mean value of the sequence is 70. If 30 is added to each term, and then each term is divided by 2, then

Open in App

Solution

The correct options are

**B** the absolute value of difference between new mean and old mean is 20

**D** the position of new median will not change.

Mean of 7 data ¯x=70

now 30 is added and divided by 2 then new mean is

New mean =(¯x+30)×12

=(70+30)×12

=50

Now absolute value of difference is |50−70|=20

Since all the terms has been added with 30 and then divided by 2, therefore the position of median (middle term) will not change.

Mean of 7 data ¯x=70

now 30 is added and divided by 2 then new mean is

New mean =(¯x+30)×12

=(70+30)×12

=50

Now absolute value of difference is |50−70|=20

Since all the terms has been added with 30 and then divided by 2, therefore the position of median (middle term) will not change.

2

View More

Join BYJU'S Learning Program

Join BYJU'S Learning Program