Question 948125
"A and B are independent events" which means
P(A and B) = P(A)*P(B) = 0.3*x = 0.3x


For now, P(B) is unknown. We'll just leave it as x for now.


P(A or B) = P(A) + P(B) - P(A and B)
0.8 = 0.3 + x - 0.3x


Solve the equation above for x to get your final answer. I'll let you take over and do this part.