What is the greatest common factor (GCF) of 24 and 42?

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

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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