147.59 is the total amount given to each brother after all purchases were made.
X(m+n) = p
x = p/(m+n)
Hope this helps!
there are 8 letters
2/8 to get i on the first draw
1/7 to get i on the second draw (no replacement)
2/8 * 1/7 = 2/56
1/28
The probability is 1/28
1
3.50
3.50
+3.50
______
10 .50
It is a math mathematical form of objects natural stance, to find it you need the positive integer and its finite sequence of digits.