Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Probability
There are 9 balls in a box; 2 is red, 3 is blue, and 4 is black. What is the probability that all the balls will be of different colours, if 3 balls are drawn at random?
1
\(\frac{2}{9}\)
2
\(\frac{2}{7}\)
3
3
4
More than one of the above
5
None of the above