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## WAEC 2021 Further Mathematics Theory and Objective Answers /Expo |
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WAEC 2021 Further Mathematics Theory and Objective Answers /Expo by Blogger: 1:06 am On August 2, 2021 |

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## Past WAEC Further Mathematics Answers1-10DCADBCCDCC THEORY (1) X-3(12-2x+8)+4(30-5x-4)+3(-20-4) = -24 (2) (3a) (3b) No 4 5)x-8,5,1,7,2,6,3,4 Coefficient of Correlation = ∑xy / √(∑x²∑y²) Where: x = (X – Mean) y = (Y – Mean) Data table Mean of the set of Data for X = ∑X / N ∑X = 8 + 5 + 1 + 7 + 2 + 6 + 3 + 4 ∑X = 36 Mean of the set of Data for X = 4.5 Mean of the set of Data for Y = ∑Y / N ∑Y = 6 + 3 + 4 + 8 + 5 + 7 + 1 + 2 ∑Y = 36 Mean of the set of Data for Y = 36 / 8 Mean of the set of Data for Y = 4.5 From the Data Analysis we have: ∑xy = 5.25 + -0.75 + 1.75 + 8.75 + -1.25 + 3.75 + 5.25 + 1.25 ∑xy = 24 ∑x² = 12.25 + 0.25 + 12.25 + 6.25 + 6.25 + 2.25 + 2.25 + 0.25 ∑x² = 42 ∑y² = 2.25 + 2.25 + 0.25 + 12.25 + 0.25 + 6.25 + 12.25 + 6.25 ∑y² = 42 starlight Coefficient of Correlation = 24 / √(42 x 42) Coefficient of Correlation = 24 / √(1764) Coefficient of Correlation = 24 / 42 Coefficient of Correlation = 0.5714 (6) Hence, = (1/3 × 4/5) + (1/5 × 2/3) ==================================== (7) Therefore: ============================ (a) (b)
(9) radius is the same hence Taking the second pair (a) coordinates of centre is (11/6, -31/18) (b) Radius r = √(y-2)²+(x-3)² (c) (X – 11/6)² + (y + 31/18)² = 3.9² Tags: Expo ,WAEC 2019/2020 Expo Questions and Answers ,WAEC Expo |

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