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hey!!! I was wondering if anyone knew how to solve part B for this question. I can't seem to wrap my head around it. The answer is x= -3. Thank you!!

I need help with the following: 1) A student writes a random three-digit number using the digits 1-9. what is the probability that the three digits in the number are all the same? 2) five cards are drawn from a standard pack of 52 playing cards (without replacement). what is the probability of...

heyyy can someone please help me with this question? Twelve people arrive at a restaurant. There is one table for six, one table for four and one table for two. In how many ways can they be assigned to a table? thank you