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1. |
Two brother X and Y appeared for an exam. Let A be the event that X is selected and B is the event that Y is selected.The probability of A is $$\frac{{1}}{{7}}$$ and that of B is $$\frac{{2}}{{9}}$$. Find the probability that both of them are selected. |
A. | $\frac{{1}}{{63}}$$ |
B. | $\frac{{2}}{{35}}$$ |
C. | $\frac{{2}}{{63}}$$ |
D. | $\frac{{9}}{{14}}$$ |
Answer» D. $\frac{{9}}{{14}}$$ | |