What expression is equivalent to √2/∛2

Abcd is a parallelogram. the diagram is not drawn to scale. if m

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Ineed in figuring out this problem.