So here is my question, "Din is the coach of a soccer team. Base on the team's record, it has a 70% chance of winning on good weather and a 50% chance of winning on bad weather. Tomorrow there is a 30% chance of bad weather. There are no ties in Din's soccer team record. What is the probability that Din's team will win tomorrow?"

Ok so what I did is 70%/100% + 50%/100% + 30%/100 = 150%/300% then I did this ,150 divided by 300 equals to 0.5 which is 50% I don't know if this is right, it's what my younger brother told me.