SOLUTION: The 20 balls in a box as shown above have either 0 (blank), 1, or 2 letters on them. If five balls have only a C on them, two balls have only a B on them, and two balls have an A

Algebra.Com
Question 1042395: The 20 balls in a box as shown above have either 0 (blank), 1, or 2 letters on them. If five balls have only a C on them, two balls have only a B on them, and two balls have an A and a C on them, what is the maximum number of balls that can be blank?
Answer by Edwin McCravy(20055)   (Show Source): You can put this solution on YOUR website!
The 20 balls in a box as shown above have either 0 (blank),
1, or 2 letters on them. If five balls have only a C on
them, two balls have only a B on them, and two balls have
an A and a C on them, what is the maximum number of balls
that can be blank?
There are no balls with 3 letters.  Since the 5+2+2 = 9 balls 
mentioned include some with only one letter, and some with two 
letters, the other 20-9=11 balls could all be blank.  So the 
answer is 11.

Edwin
RELATED QUESTIONS

The 20 balls in a box (5 Balls with A on them, 10 Balls with B on them, 7 Balls with C on (answered by solver91311)
There are 20 balls in a box (5 balls with A on them, 6 balls with B on them,8 balls with... (answered by solver91311)
1) There are 10 tennis balls in a box; 6 of them are new. Then two balls are taken from... (answered by ikleyn)
A box contains 60 colored balls: 45 of the balls are purple,and 30 of the purple balls... (answered by Theo)
A bag contains 100 cards with letters on them. There are 50 cards with a letter A on... (answered by josmiceli,Edwin McCravy)
Hello, I have this problem I can't really solve: In the box there are balls with 1, 2,... (answered by Boreal,greenestamps)
There are 600 balls in a box, and 1/3 of the balls are red. How many red balls are in the (answered by neatmath,Fombitz)
A box contains 65 balls numbered from 1 to 65. If 10 balls are drawn with replacement,... (answered by stanbon)
A box contains 50 balls numbered from 1 to 50. If 10 balls are drawn with replacement,... (answered by stanbon,Alyrian)