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?

A. 70.97%

B. 62.56%

C. 58.99%

D. 67.81%

Question

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?

A. 70.97%

B. 62.56%

C. 58.99%

D. 67.81%

anonymous_user · Answer

A. 70.97%

anonymous · Answer

how'd you get that number?

anonymous_user · Answer

This may help: http://openstudy.com/study#/updates/5326f6d6e4b0ba8d4c417d8f

anonymous · Answer

oh ok i get it now. Thank you for the help xD

anonymous_user · Answer

xD No problem.

anonymous · Answer

could you maybe help me on another?

anonymous_user · Answer

I can try! :)

anonymous · Answer

thanks. here's the other one and its timed too

anonymous · Answer

Of the 1,000 students in a local college, 420 own brand X mobile phones and 580 own brand Y mobile phones. Of these students, 80 own both brands of mobile phones. Find the probability that a student chosen at random has a brand X mobile phone given that he has a brand Y mobile phone.

A. 214

B. 521

C. 328

D. 429

anonymous · Answer

please helpp

anonymous_user · Answer

I'm trying. I need a minute.

anonymous · Answer

okay

anonymous · Answer

oh sorrry those the wrong answers. smh

anonymous · Answer

A. 2/14

B. 5/21

C. 3/28

D. 4/29

anonymous · Answer

If you cant find it then just forget it ok (:

anonymous_user · Answer

I think it may be B.