WORD PROBLEMS on Statistics 2 for Class 9 and 10
Question for practice
The following questions are more helpful for class tenth students for all boards.
Questions 2. The mean of 20 numbers is
18. If 3 is added to each of the first ten
numbers, find the mean of the new set of
20 numbers.
Submit your answer here in the comments or wait for answer
The following questions are more helpful for class tenth students for all boards.
Questions 2. The mean of 20 numbers is
18. If 3 is added to each of the first ten
numbers, find the mean of the new set of
20 numbers.
18. If 3 is added to each of the first ten
numbers, find the mean of the new set of
20 numbers.
Submit your answer here in the comments or wait for answer
18 = Efixi/20
ReplyDeleteso . Efixi = 360
add 3 to 1st 10 observations
so, Efixi = 360 + 30 = 390
so new mean = 390/20 = 19.2
Mean= Σfixi/n
ReplyDelete18 = Σfixi/20
∴ Σfixi=360
adding 3 to first 10 observations
Σfixi=360+30
= 390
new mean= 390/20
= 19.5
19.5
ReplyDelete19.5
ReplyDelete