An urn contains 5 red and 2 green balls, one ball is chosen from urn. If it is red then a green ball is put back into Box, and if it green then a red ball is put in to box (previous ball was not put in that box). Then a second ball is drawn the probebility that it is red ball is (a) $\frac{32}{49}$ (b) $\frac{17}{49}$ (c) $\frac{15}{49}$ (d) $\frac{36}{49}$

Views: 738 students