Question: A concrete beam may fail by shear or flexure. The failure probability in shear is equal to failure probability in flexure, and the probability of

A concrete beam may fail by shear or flexure. The failure probability in shear is equal to failure probability in flexure, and the probability of failure in shear when the beam is loaded beyond its flexural capacity (i.e., the beam already failed in flexure) is 80%. Find the failure probability of the beam in flexure, knowing that the probability of failure of the beam is 0.2.

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