The scores of quizzes from 10 students is sampled. The scores, out of 20, are 12, 14, 14, 9, 17, 16, 18, 10, 8, 16. What is the
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Assuming that you're talking about a standard deck of 52 cards, there are 4 tens and 4 aces.
So, at the beginning, you have probability 4/52=1/13 to draw a ten.
You replace, and you have an identical probability to draw an ace (you still have 4 favourable cases over 52 total cases).
Multiply the two probabilities to find the answer: