Question 1193485
recall that

P(F|E) = P(E an dF)/P(E) 

given:

P(E)=0.4 

 P(F|E)=0.5

substitute in equation above

 0.5 = P(E and F)/0.4  

 0.4 *0.5 = P(E and F) 

  P(E and F)=0.2