Math, asked by anandgowdru71, 4 months ago

the mean of 30 numbers is 18. find the mean if each observation is increased by 3​

Answers

Answered by simran070907
1

Answer:

......

Step-by-step explanation:

The mean of 20 observation is 25

∴ Sum of 20 observations =20×25=500

⇒ New sum of 20 observations after increasing each observation by 2 =(2×20)+500=40+500=540

⇒ Required mean =

20

540

=27

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