<PRE><B>Question 1105631</B>
There are 15 + 10 + 20 + 5 = 50 balls in the box
:
The balls are selected with replacement
:
1) (10/50) * (10/50) = 1/25
:
2) (15/50) * (10/50) = 3/50
:
3) (45/50) * (45/50) = 81/100
:
4) (15/50) + (10/50) + (3/50) = 28/50 = 14/25
:
5) 1 - (20/50) = 3/5
:
6) (5/50) = 1/10
:
7) (20/50) + (20/50) = 4/5
:
8) ?
:
9) (10/50) * (1 - (10/50)) = (1/5) * (4/5) = 4/25
:
10) (15/50) * (1 - (15/50)) = (3/10) * (7/10) = 21/100</PRE>