Yvonne always buys lemons and apples in the ratio 3:7. If she buys 30ieces of fruit in total, how many lemons did she buy?

9 because 3:7 means that for every 3 lemons she buys there's 7 apples being bought so you'd add 3+7 until it equals 30 and that's your answer which here is 9 Lemons.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24