Answer:
<h2>1 / 15 = 0.06666666666....</h2>
Step-by-step explanation:
<u>Total Number of Rolls = 10</u>
<u>Number of Defective Rolls = 3</u>
<u>Probability = Number of Defective Rolls / Total Number of Rolls</u>
Probability = 3 / 10
Now there is one less defective roll.
Total Number of Rolls = 10 - 1
Number of Defective Rolls = 3 - 1
Total Number of Rolls = 9
Number of Defective Rolls = 2
<u>Probability = Number of Defective Rolls / Total Number of Rolls</u>
Probability = 2 / 9
<u>Multiply the two probabilities together to find the overall probability.</u>
3 / 10 * 2 / 9
3 * 2 = 6
10 * 9 = 90
6 / 90
<u>Simplify</u>
6 / 90 = 3 / 45 = 1 / 15 = 0.06666666666....