Question

the mean of 20 observation is 63. if an observation 50 is repeated by 90. find the new mean.
please give the correct solution
class 9
please reply fast​

Answer 1

Answer:

The New mean is 65.

Step-by-step explanation:

63=(∑xi)/20

∑xi=63×20=1260

∑xi(new)=1260-50+90=1300

new mean=1300/20=65