Check this:
https://www.algebra.com/algebra/homework/playground/test.faq.question.967183.html
Similar question that will help you:
https://www.algebra.com/algebra/homework/proportions/Proportions.faq.question.1099157.html
https://web2.0calc.com/questions/algebra_41858
This is a similar question that will help you:
https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.162966.html
This isn't the exact question, but it will help you!
https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.996051.html
Check this out:
https://study.com/academy/answer/seventy-percent-of-the-students-applying-to-a-university-are-accepted-using-the-binomial-probability-tables-or-excel-what-is-the-probability-that-among-the-next-18-applicants-at-least-6-will-be-ac.html
Well... you can always use a calculator...
How to find the arc:
(Diameter*pi)/2
This also has a similar question that will help you:
https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.220872.html
https://www.cracksat.net/sat/math-grid-ins/question-no-225-answer-and-explanation.html
