'Numbers 1,2 15 are randomly placed at positions numbered 1,2, 15. Find the expected number of the numbers that are placed in their respective places (i.e,, the number equals the number of the position)'
Added by Rebecca G.
Step 1
Since there are three possible positions, the probability of placing 1 in position 1 is 1/3. Similarly, the probability of placing the number 2 in its respective place, which is position 2, is also 1/3. However, the probability of placing the number 15 in its Show more…
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