I have been trying desperately to solve this task, unfortunately I had no success whatsoever.

Here is the task:

"In a certain experience the probability of success is"P" (0<P<1).

It's known that if all four tests are executed then the probability of all of them to succeed is multiply 16 from the probability that all four experiences will fail. A: Find P."

final result is : 2\3

So I was able to calculate according to Bernoulli's table and get this equation ;

16P*(1-p)^4=1P^4*(1-p)^0.

^=Power

Can any one please help me solving this whole task please?