yes there's a chance. 1 in 1 million chance, but there's a chance.

If you have a 1 percent chance of doing something, and you have 30 tries, your chance of succeeding is 26 percent, or 1 - (1 - .01)30.

25 times

This is because there is a 1/2 chance of there being one head and one tail, and only 1/4 each of there being two heads or two tails:

Coin 1: H (1/2 chance) x Coin 2: H (1/2 chance) = 1/4 chance

Coin 1: T (1/2 chance) x Coin 2: H (1/2 chance) = 1/4 chance

Coin 1: H (1/2 chance) x Coin 2: T (1/2 chance) = 1/4 chance

Coin 1: T (1/2 chance) x Coin 2: T (1/2 chance) = 1/4 chance

Coin 1 being heads and Coin 2 being tails is the same vice versa, so:

50 tosses x (1/4 + 1/4) = 25 times

If the chance is 1 in 200000 it is not a commonevent!

1:365.25 chance