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# 4 students out of 28 gained a grade of 5. Students are chosen at random until a student chosen has a grade of 5. Find the probability that t

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4 students out of 28 gained a grade of 5. Students are chosen at random until a student chosen has a grade of 5. Find the probability that this is the third student chosen.

Guest Mar 6, 2015

#1
+91510
+5

$$\frac{24}{28}\times\frac{23}{27}\times\frac{4}{26}$$

ask questions if you do not understand. :)

Melody  Mar 7, 2015
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#1
+91510
+5
$$\frac{24}{28}\times\frac{23}{27}\times\frac{4}{26}$$