EVENT PROBABILITY
First set of O- rings function
correctly and second O-ring
functions correctly .7552
First set of O-rings malfunction
and second O-ring functions
correctly .1138
1st set of O-rings function
correctly and 2nd O-ring
malfunctions .1138
1st set of O-rings malfunction
and 2nd O-ring malfunctions .0172
Fill in the probability distribution table
x P(x)
0
1
2
Total
Then using the probabilities from the table find
P(Explosion on lift-off)
P(Safe lift-off)