exam Maths Puzzle Numerical Ability

I have to do a really big project and I got stuck doing this. I do not know what is means. What is an algebraic expression using equations and inequalities? Will you give me examples of each.

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Hello, I am not sure if I am in the right area for this question...if not please direct me on what this problem is called (that is my main problem, not sure how to categorize it). According to the Bureau of the Census, 85.1% of adult residents of Arizona have
completed high school. What is the probability that no more than 80% of the Persons in a simple ran