Mw is 118 because a whole circle equals 360. you would do 360= 156+86+mw
Mean is 
and a standard deviation is 
, then the variable 
.
Use substitution
.
This substitution gives you that 
.
a. For X=130, 
and 
(the decimal value is taken from the Standard Normal Distribution Table).
b. For X=90, 
and for X=110, 
. Then 
(the decimal value is taken from the Standard Normal Distribution Table).
Let the number of green apples and red apples be 8x and 3x respectively.
Given: 8x-3x =35
=> 5x =35 => x=7
Hence there are 8x=56 green apples and 3x=21 red apples.Ans.
