If C and D are two events such that C⊂D and P(D)≠0, then the correct statement among the following is
In the following diagram PA, PB, PC, PD and PE be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.
In the adjoining figure, ABCD and PQRC are rectangles, where Q is the midpoint of AC. Then DP is equal to