The enrolment of a school during seven consecutive years was as follows :
1580,2020,2580,3200,3550,3710,4010
(1) Find the mean enrolment of the school for this period .
(2) Find the new mean if the enrolment of the current year , that is 4270 is also included .
Answers
Answered by
107
1580+2020+2580+3200+3550+3710+4010= 20650
20650/7= 2950
20650+4270= 24920/8 = 3115
20650/7= 2950
20650+4270= 24920/8 = 3115
Answered by
50
Mean = sum of observations/no. of observations
(1) 1580+2020+2580+3200+3550+3710+4010=20650
(2)
20650+4270=24920
(1) 1580+2020+2580+3200+3550+3710+4010=20650
(2)
20650+4270=24920
Anonymous:
M sorry I forgot to divide
(1) is divided by 7
(2) is divided by 8
(1) 2950 and (2) 3115
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