Mathematics · Oct / Nov 2021 · Paper 21 · Question 12
0580
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Chai invests some money. By the end of the first year, the value of the investment has decreased by 35%. By the end of the second year, the value of the investment has increased by 40% of its value at the end of the first year. Find the overall percentage change in the value of the investment. % [3]
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[– ] 9 [3]
M2 for [k × ] 35 40 1 − × 1 + oe or 100 100 better 35 35 40 or for [k × ] − 1 − × 100 100 100 35
or M1 for [k × ] 1 − oe 100 40 or [k × ] 1 + or better 100
M1 for 20 – 15x ⩾ 6 – x or
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