1.

The mean of 30 number is 18. what will be the new mean, if each observation is increased by 2j​

Answer»

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 =  540/20​  

                                =27            



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