The enrolment of a school during seven consecutive years was as follows:
1580, 2020, 2580, 3200, 3550, 3710, 4010
(0) Find the mean enrolment of the school for this period.
( Find the new mean, if the enrolment of the current year, that is, 4,270 is also in
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Step-by-step explanation:
As we know that mean (average) = sum of terms/ no. of terms
=> so 1580+2020+2580+3200+3550+3710+4010/7
=> 20650/7
=> 2950 answer
also 20650+4270/8
=> 3115 answer
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