Probability. Qn 25

I’m working on a Mathematics question and need guidance to help me study.

The number of adults living in homes on a randomly selected city block is described by the following probability distribution.

Number of adults, x 1 2 3 4 or more
Probability, P(x) 0.25 0.50 0.15 ???

What is the probability that 4 or more adults reside at a randomly selected home?





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