Answers

2015-12-28T15:37:24+05:30
Sample space, n(S)=a²-b²
event A    n(A)=a+b
probability,p(A)= \frac{n(A)}{n(S)}
                        = \frac{a+b}{ a^{2}- b^{2}  }
                        = \frac{a+b}{(a+b)(a-b)}
                        =a-b 
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