There are 10 rolls of film in a box and 3 are defective. Two rolls are to be sel

Question

There are 10 rolls of film in a box and 3 are defective. Two rolls are to be selected without replacement. What is theprobability of selecting a defective roll followed by anotherdefective roll? Which is the correct answer? A. 1/2, or 0.50 B. 1/4, or 0.25 C.  1/120, or about 0.0083 D. 1/15 , or about 0.07 There are 10 rolls of film in a box and 3 are defective. Two rolls are to be selected without replacement. What is theprobability of selecting a defective roll followed by anotherdefective roll? Which is the correct answer? A. 1/2, or 0.50 B. 1/4, or 0.25 C.  1/120, or about 0.0083 D. 1/15 , or about 0.07

Explanation / Answer

(3/10)(2/9) = 1/15, so D is correct

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