How many times do you serve in a row before it is the next person's turn to serve

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.

Ihave trouble finding the nth term of a linear sequence

What is another way to express 36 +32