There is still a refinement in the
probability of life:
Life is dependent on n planetary
conditions.
That they form the set N of life
prerequisites.
Then each element contributes to the overall probability.
This part is:
4.3.1 Equation 

It is: 0 <
j < n+1
then applies to the total probability of life:
4.3.2 Equation 

A differentiation of the individual components is
obtained by weighting the individual
elements.
4.3.3 Equation 

Then the probability of life is:
4.3.4 Equation 

Overall, the probability of life is:
4.3.5 Equation 

Equation 4.3.5 is the most general approach
that can be made for any set N of life prerequisites that can still be weighted in their
action by the a_{j}.
In a first approach,
it is assumed thatall parts have the same effect, so that
the weighting factors are all one, equation 4.3.2
applies.
4.3.6 Approach 
The weighting factors are
set equal to one
a_{1}
= a_{2}
= ... = a_{j}
= ... = a_{n}
= 1 


It then applies: 

It follows: 

Here are 8 components called life allow.
It applies to the single probability: f_{j}
= 1:72
Therefore, 8 failures can occur.
Thus, the chance of life arises 1 to 9.
That corresponds to a share of 11,11 %.
The probability factor for life is thus F_{L}
= 0,111... = 1:9.
This approach is used in all following considerations as
the basis of the calculations.
