Total change from parts growing at different percentages

CAT has tested this idea 3 times across 3 papers, from 2019 to 2021. Solve one, and the others are the same method with different numbers or wording, which is why repeated concepts are the most efficient thing to practise.

Question	What it asks	Answer
CAT 2019 Slot 2 · QA Q9	fiction up 10%, non-fiction up 12%; totals given	A
CAT 2020 Slot 2 · QA Q23	rice up 20%, wheat up 12%; extra spending known	C
CAT 2021 Slot 3 · QA Q10	male and female populations grow at different rates	A

Part of Percentages & Profit-Loss (46 questions since 2017).