A bag contains nine yellow balls, three white balls and four red balls. In how many ways can two balls be drawn from the bag?

A. ⁹C₂
B. ³C₂
C. ¹⁶C₂
D. ¹²C₂
Explanation:
Total number of balls = 9 + 3 + 4
Two balls can be drawn from 16 balls in ¹⁶C₂ ways.