1.

The average of 25 observations is 28. Later it was found that an observation 90 waswrongly entered as 40. What is the new average after correction?​

Answer»

Answer:

30

Step-by-step explanation:

total sum =25*28=700

it should be 90 but WRITTEN as 40 so 50 more should be added

new 700+50=750

750/25=30

new average is 30

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