I need help with practice

Empty box + box + empty box fill in the box is equal to 30 how

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if