A) \[\frac{3}{4}\]
B) \[\frac{1}{2}\]
C) \[\frac{2}{3}\]
D) \[\frac{1}{3}\]
Correct Answer: A
Solution :
Probability problem is not solved by \[A=\,1-\frac{1}{2}=\frac{1}{2}\] Probability problem is not solved by \[B=1-\frac{1}{3}=\frac{2}{3}\] Probability problem is not solved by \[C=1-\frac{1}{4}=\frac{3}{4}\] Probability of solving the problem \[=1-P\] (not solved by any body) \ \[P=1-\frac{1}{2}.\,\,\frac{2}{3}.\,\frac{3}{4}\,=\,1-\frac{1}{4}=\frac{3}{4}\].
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