Respuesta :

babygirl0328
1/2 I believe because you either have up or down either that or its 29/30 but i really do believe its 1/2
syed514
Formula for Probability is:
P(n)=N!/(n! (N-n)! p^n q^(N-n) 

where,
 p is the probability of getting one outcome=1/2 
and
 q=probability of getting the other outcome=1/2 
Putting the values in the equation:
P(29)=30!/(1! 29!) (1/2)^30 
P(29)=30 x (1/2)^30 = 2.8x10^(-8)
In percentage:0.0000028%