mean of 6 numbers is 17. It was found later that 21 was wrongly written as 12. Find the correct mean of the observation
Answers
Answered by
6
sum of data = 7(6)
= 42
42+9/2
25.5 mean
= 42
42+9/2
25.5 mean
adithya02:
this is wrong
17 is the mean, not 7
Answered by
15
let sum of all nos be x
x/6 = 17
x = 102
removing wrong number from total sum and adding correct number
x - 12 + 21 = 102 + 9 = 111.
new mean = 111/6 = 18.5
x/6 = 17
x = 102
removing wrong number from total sum and adding correct number
x - 12 + 21 = 102 + 9 = 111.
new mean = 111/6 = 18.5
Similar questions