SOLUTION: Bianca has nine major assignments to complete for school this week.Two of them involve writing essays. Bianca decides to work on three of the nine assignments tonight. What is the

Algebra ->  Probability-and-statistics -> SOLUTION: Bianca has nine major assignments to complete for school this week.Two of them involve writing essays. Bianca decides to work on three of the nine assignments tonight. What is the       Log On


   

Question 1100448: Bianca has nine major assignments to complete for school this week.Two of them involve writing essays. Bianca decides to work on three of the nine assignments tonight. What is the probability that one of the assignment is an essay ?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
2 of Bianca's assignments are essays, meaning 7 of them are not. So, the probability of all 3 being non-essays would be (7/9)^3, or 0.47050754458161865569272976680384. Therefore, the probability of at least 1 being as essay is 1-0.47050754458161865569272976680384, or 0.53
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