Question

the mean of 10 observation is 15 if one observation 15is added then the new mean is​

Answer 1

Step-by-step explanation:

please mark me as a brainlist please

Answer 2

Answer:

15

Step-by-step explanation:

given, the mean of 10 observation = 15

=> sum of 10 observations = 10*15 = 150

new observation (11th) added = 15

=> the new sum with the 11th observation = 150+15

                                                                     = 165

so, the new mean = sum of 11 observations / 11

                               = 165/11

                                = 15