1.The mean of 5 no. is 18.If one number is excluded their mean is 16.find the excluded no. 2.The mean of 10 no. is 20.If 5 is subtracted from every no,what will be the new mean?
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1.
let
x / 5 = 18
x = 18 * 5 = 90
now 1 no. is excluded then mean =
x / 4 = 16
x = 16 * 4
x = 64
excluded no. = 90 - 64
26.
2.
let
x / 10 = 20
x = 20*10
x = 200
5 is subtracted from each no.
200 - ( 10 * 5 )
200 - 50 = 150
new mean
150 / 10
15
hope it helps....
plz. mark as brainly..
let
x / 5 = 18
x = 18 * 5 = 90
now 1 no. is excluded then mean =
x / 4 = 16
x = 16 * 4
x = 64
excluded no. = 90 - 64
26.
2.
let
x / 10 = 20
x = 20*10
x = 200
5 is subtracted from each no.
200 - ( 10 * 5 )
200 - 50 = 150
new mean
150 / 10
15
hope it helps....
plz. mark as brainly..
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