What is the common denominator as a fraction of 5/4 and 11/16

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Which angle of rotation is an angle of rotational symmetry for all figures?