Drinks are prepared and arranged on a table for a party. The probability that a drink is grape juice is 0.3. The probability tha
t a drink has a straw is 0.3. The probability that a drink is grape juice and has a straw is 0.1. Use the addition rule to determine the probability that a drink is grape juice or has a straw. Enter your answer as a decimal, rounded to the nearest tenth, like this: 0.4
