What is the chance that for 30 random spins, 29 will be up? ?

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

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%

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The answer is biodiversity resulting from new ancestors.