very difficult to get 4 numbers correctly, I've often tried this game but never get a win. gamble is base on luck can't be calculated by percentage 
Yeah that's what I was referring to earlier.
Hence why in my opinion its a waste paying $2 trying to win the lottery which is 6 numbers and its impossible to guess those correctly, even with multiple tickets.
Getting 4 numbers correctly is very difficult also. Most people I know that played the state lottery maybe won once or twice getting 3 numbers.
Hence why you might as well choose your own odds with a regular game of dice.
That is a true thing, but you will never know about your luck right? I ever read that someone win their powerball lottery when they are around 50-60years old and every day he spent on some tickets to hit their luck. In the end they just win very huge amount on that, I am sure they already recover their loss from buying tickets everyday by just winning 1 time jackpot here. But it is different when you are gambling by online lottery which does not and never guarantee that you are going to hit because there is always house edge