general Maths Puzzle

There are 37 students in a classroom. What is the probability that at least 4 of them would have their birthday in the same month?

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general Other Question
If my house number is a multiple of 3, then it is a number from 50 to 59 (inclusive). If my house number is not a multiple of 4, then it is a number from 60 to 69 (inclusive). If my house number is not a multiple of 6, then it is a number from 70 to 79 (inclusive). What is my house number? Find a ten-digit number such that the first digit tells you how many zeros are there, second digit tells you how many ones are there, third digit tells you how many twos are there and so on