Please answer it step by step​

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

What is always true about a positive integer raised to a negative odd power?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog