# A simple tricky probability

Discrete Mathematics Level 4

Suppose $$A$$ and $$B$$ shoot independently until each hits his target.They have probabilities $$\frac{3}{5} ~and~ \frac{5}{7}$$ of hitting the targets at each shot. Find the probability that $$B$$ will require more shots than $$A$$.

Plz help me out in this

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