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Using it's concept, it is found that there is a 0.625 = 62.5% probability that an individual owns a stock.
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, out of 200 graduates, 35 + 90 = 125 of them own stocks, hence:
p = 125/200 = 0.625.
There is a 0.625 = 62.5% probability that an individual owns a stock.
More can be learned about probabilities at https://brainly.com/question/14398287