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    				| 1. | 
                                    यदि `(If) P(B)=1/3` तथा `(and) P (A nnB)=1/4` तो (then find ) P (A /B ) ज्ञात करे। | 
                            
| Answer» `P(A//B)=(P(AnnB))/(P(B))=((1)/(4))/((1)/(3))=3/4` | |