Question

3 р.
2. The Mean of 50
observations was 180. It was
observed that the value of 170
was wrongly copied as 120.
Find the correct Mean (3
marks)​

Answer 1

Answer:

Step-by-step explanation:

x = 50*180

x = 50*180 - 140+170

x= 50*100+30/50

x= 530/50

x = 10.6

so, the mean is 10.6

hope this helps!

Answer 2

Answer:

Sum of all observation=50×180=9000

It was observed that the value of 170 was wrongly copied as 120.

New sum =9000+170-120=9050

Correct mean=9050/50=181