HELP ME PLASE IM BEGGING YOU

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

Can someone tell me if this is perpendicular? !

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid