0 votes 0 votes In how many different ways can 8 identical balls be distributed among three children if each receives at least two balls and no more than four balls ________? A 3 B 9 C 6 D 12 Mathematical Logic discrete-mathematics + – Jaspreet Kaur Bains asked Dec 21, 2017 Jaspreet Kaur Bains 480 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes X1+X2+X3 = 8 satisfying lower constrain, giving two to each X1+X2+X3 = 2 now, find coeff. of X^2 $using \binom{n-1+r}{r} \binom{3-1+2}{2}$ =6 Akash Mittal answered Dec 22, 2017 Akash Mittal comment Share Follow See 1 comment See all 1 1 comment reply Rohit Gupta 8 commented Dec 28, 2017 reply Follow Share Tell me whats wrong in my approach. After distributing each child two balls, there are only 2 balls to be distributed these two balls can go to any of 3 children so 3*3 =9 ways. 0 votes 0 votes Please log in or register to add a comment.