Let B, Y, and R be the number of blue, yellow, and red balls drawn respectively.
We are given B+Y+R=8 with B≥2, Y≥2, and R≥2.
The possible combinations for (B,Y,R) are:
Case 1: (2,2,4)
Case 2: (2,3,3)
Case 3: (2,4,2)
Case 4: (3,2,3)
Case 5: (3,3,2)
Case 6: (4,2,2)
The number of ways for each case is calculated as follows:
Case 1: 5C2×6C2×4C4=10×15×1=150
Case 2: 5C2×6C3×4C3=10×20×4=800
Case 3: 5C2×6C4×4C2=10×15×6=900
Case 4: 5C3×6C2×4C3=10×15×4=600
Case 5: 5C3×6C3×4C2=10×20×6=1200
Case 6: 5C4×6C2×4C2=5×15×6=450
Total number of ways =150+800+900+600+1200+450=4100
Answer: 4100