Question

7.
(i)
(ii)
The mean of 13, 15, 19, 23, x and 29 is 20. Find the value of x.
The mean of 16 numbers is 8. If 2 is added to every number, wl​

Answer 1

Answer: 21

Step-by-step explanation:

i) Mean of the given numbers is (13+15+19+23+x+29)/6

{as mean of numbers= sum of numbers/total no. of numbers}

the mean is given as 20

Hence, 13+15+19+23+x+29= 20×6

∴ 99+x = 120

⇒ x=21