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Questions  >>  CBSE XI  >>  Math  >>  Probability
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A team of medical students doing their internship have to assist during surgeries at a city hospital.The probabilities of surgeries rated as very complex,complex,routine,simple or very simple are respectively 0.15,0.20,0.31,0.26,0.08.Find the probabilities that a particular surgery will be rated complex or very complex

$\begin{array}{1 1}(A)\;0.35\\(B)\;0.45\\(C)\;0.55\\(D)\;0.65\end{array} $

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