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At the school carnival, 50 sixth-grade, 30 seventh-grade, and 40 eighth-grade students bought tickets for the raffle. At the end of the night, Quincy draws out two names without replacement. What is the probability that she draws two-seventh-grade students? Please explain?

 Apr 10, 2021
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120 students   30 are seventh grade

    1st draw is 7th grader   30 /120   chance

         now there is 119 students left and 29 seventh graders

              2nd draw 7th grader     29/119  

 

30/120 * 29/119 = 29/476

 Apr 10, 2021

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