# Balls

We have n identical balls (numbered 1-n) is selected without replacement. Determine
1) The probability that at least one tensile strength number coincides with the number of balls?
2) Determine the mean and variance of the number of balls, which coincides with the number of balls numbered order.

Correct result:

p =  0
m =  0
σ =  0 We would be pleased if you find an error in the word problem, spelling mistakes, or inaccuracies and send it to us. Thank you! Tips to related online calculators
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