A) \[\frac{25}{192}\]
B) \[\frac{1}{192}\]
C) \[\frac{25}{32}\]
D) \[\frac{7}{32}\]
Correct Answer: C
Solution :
Let persons be A,B,C,D P(Hit) = 1 - P(none of them hits) \[=1-P\left( \overline{A}\cap \overline{B}\cap \overline{C}\cap \overline{D} \right)\] \[=1-P\left( \overline{A} \right).P\left( \overline{B} \right).P\left( \overline{C} \right).P\left( \overline{D} \right)\] \[=1-\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{7}{8}\] \[=\frac{25}{32}\]You need to login to perform this action.
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