Mega Millions uses 75 numbers for the first five selections and 15 numbers for the Mega ball.
The number of unique combinations of five numbers selected from a pool of 75 is
Multiply that times 15 possibilities for the Mega ball and the odds of winning come out to 1 in 258,890,850.
BUT THE CURRENT MEGA MILLIONS JACKPOT IS OVER $350 MILLION!
Any time you can get 350 million to one odds on a 258 million to one bet, you’ve got to take it.