Mathematics, 20.09.2020 06:01, lilkit

There are 15 pens and 10 pencils in a box. One object is selected at random and then replaced. Another is the selected. Find the probability that: 1. The first object selected is a pen and the second is a pencil
2. One is a pen and the other is a pencil
3. Both are pencils
4. At least one is a pen

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There are 15 pens and 10 pencils in a box. One object is selected at random and then replaced. Anoth...

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