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Answer:</h2><h2>The probability of selecting a defective roll followed by another defective roll =

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Step-by-step explanation:
The total number of rolls in a box = 15
The number of defective items = 3
Two rolls are to be selected, one after the other. The probability of selecting a defective roll followed by another defective roll = ?
The probability that the first roll is detective = 
The probability that the second roll is detective = 
Required probability = 
= 
Greatest common factor
faceor each and find common groups
18a=2 times 3 times 3 times a
20ab=2 times 2 times 5 times a tmes b
6ab=2 times 3 times a times b
common group is
2 times a
answe ris 2a
Step 1: Add up all the scores.
Step 2: count the number of scores.
step 3: divide the sum of the scores by the number of scores themselves.
step 4: The answer is 26 points.