Lotto pick 7 out of 40

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Calculate the lotto probability:

7 numbers out of 40

Lotto Draw #1:

7 ways to pick the winner

With 40 total choices

Lotto Draw #2:

6 ways to pick the winner

With 39 total choices

Lotto Draw #3:

5 ways to pick the winner

With 38 total choices

Lotto Draw #4:

4 ways to pick the winner

With 37 total choices

Lotto Draw #5:

3 ways to pick the winner

With 36 total choices

Lotto Draw #6:

2 ways to pick the winner

With 35 total choices

Lotto Draw #7:

1 way to pick the winner

With 34 total choices

Calculate probability:

Each drawing is independent

Final Answer