Can someone help me with the steps PLEASE!!!
You are performing two chemistry experiments. The probability that both experiments are successful is 22%. If the first experiment is successful, the probability that the second experiment is also successful is 31%. What is the probability that the first experiment is successful?

Question

Can someone help me with the steps PLEASE!!!
You are performing two chemistry experiments. The probability that both experiments are successful is 22%. If the first experiment is successful, the probability that the second experiment is also successful is 31%. What is the probability that the first experiment is successful?

kitkat16 · Answer

@terenzreignz can u help please!!!

anonymous · Answer

This is a question of a conditional probability. 
Suppose A= probability of 1st experiment being successful
             B= probability of 2nd experiment being successful

So, probability of A given B = P ( $$\frac{P (A and B) }{ P(B) }= 22/31$$

kitkat16 · Answer

Thank you I understand now I was doing it completely wrong. so it is
22/31
22 divided by 31
0.709677
70.9677
70.97%

anonymous · Answer

Yes, right!

kitkat16 · Answer

THANKS!!!!!