Tiêu đề WK9 - Y3 - MATH - HW - Data and Statistics - AN.docx.pdf ✅

ANSWER KEY QUESTIO N CORRECT ANSWER 1 D Zoo = 12.5% Garden = 12.5% 12.5 +12.5 = 25% or 1⁄4 2 D Week 1 = 90 Week 2 = 180 Week 3 = 270 Week 4 = 150 Week 5 = 270 90+180+270+150+270 = 960 bottles 3 E Given: WATER TREATMENT PLANT INCREASE OR DECREASE (in millions of cubic metres) March April May June July A 1.1 (3.4) 1.9 2.0 0.6 B (2.3) 5.5 (4.5) 3.9 (2.9) C 10.0 (6.6) 5.3 1.1 (3.0) Solution: Parenthesis = negative Choice A 1.1 - 3.4 + 1.9 = 0.4 decrease Choice B -3.4 + 1.9 + 2.0 = 0.5 increase Choice C -2.3 + 5.5 - 4.5 = 1.3 decrease Choice D -4.5 + 3.9 -2.9 = 3.5 decrease Choice E -6.6 + 5.3 + 1.1 = 0.2 decrease ← Lowest/Closest to 0 ©Scholarly 2025. All rights reserved. All digital content and materials provided are proprietary and protected under copyright law. Any reproduction or sharing of digital files, including screenshots, recordings, or downloads, is strictly prohibited without the prior written consent of Scholarly. 1

7 B Shop A: Notebooks = 3(50) = 150 Pencils = 2(20) + 10 = 50 Shop B: Notebooks = 2(50) = 100 Pencils = 5(20) = 100 Shop C: Notebooks = 4(50) + 25 = 225 Pencils = 3(20) = 60 Shop D: Notebooks = 2(50) + 25 = 125 Pencils = 3(20) + 10 = 70 Only Shop B has the same number of notepads and pencils sold. 8 C Highest are Teams H, D, and B. The scores of teams H, D, and B are 110, 100, and 90, respectively. Total score of these 3 teams is 110+ 100 +90 = 300. The average score of these 3 teams is 300/3 = 100 points. 9 E Maths = 28% Literature = 12% 28 + 12 = 40 % 40/100 = X/3 X = 1.2 hours 1.2 x 60 = 72 mins 10 A ©Scholarly 2025. All rights reserved. All digital content and materials provided are proprietary and protected under copyright law. Any reproduction or sharing of digital files, including screenshots, recordings, or downloads, is strictly prohibited without the prior written consent of Scholarly. 3