Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A biased coin has `2/3` probability of landing heads. If the coin is flipped 50 times, then the probability that the number of heads is zero or even is- - Sarthaks eConnect

A biased coin has `2/3` probability of landing heads. If the coin is flipped 50 times, then the probability that the number of heads is zero or even is-

`(3^50+2^50)/2.3^50`

`(3^50+1)/2.3^50`

`(3^50-1)/2.3^50`

`(3^50-2^50)/2.3^50`