Lottery Ticket

A sequence of seven digits is randomly chosen in a weekly lottery. Every digit can be any of the digits $0,1,2,3,4,5,6,7,8,9$. What is the probability of having at most five different digits in the sequence?

Probability

Combinatorics

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Statistics

Attempt 57

Solve 8

First Solve shahriaraminarif1234

Source

Calibration Round #16