first you have to subtract four from both sides of the equation so it leaves you with 2x=6. Then all you have to do it divide both sides by 2 2/2, 6/2, then you come out with x=3
Due to the common probability formula I can solve that task. Refering to the task you gave, we have all the information we need. We solve it like that: So the answer is the first option <span>0.621%</span>