The mean of a certain number of observations is 40. If two or more items with
values 50 and 64 are added to this data, the mean rises to 42. Find the number
of items in the original data.
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4
Answer:
Let 'n' be the number of observations whose mean = 40. total of n values. Two more items of values 50 and 64 are added therefore, total of (n + 2) values : Now new mean is 42.
Explanation:
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Answered by
1
Answer:
Answer:
Let 'n' be the number of observations whose mean = 40. total of n values. Two more items of values 50 and 64 are added therefore, total of (n + 2) values : Now new mean is 42.
Explanation:
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