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WAEC 2021 Further Mathematics Theory and Objective Answers /Expo
|WAEC 2021 Further Mathematics Theory and Objective Answers /Expo by Blogger: 1:06 am On August 2, 2021|
WAEC 2021 Further Mathematics exam will be holding on 9th May, 2019. As we have been doing for other exams, we are here to help you with the Further Mathematics Theory and Objective Answers. Most importantly, you should subscribe to Earboard.com Waec Runz so that you get correctly solved answers to the Further Mathematics questions.
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Past WAEC Further Mathematics Answers
X-3(12-2x+8)+4(30-5x-4)+3(-20-4) = -24
Coefficient of Correlation = ∑xy / √(∑x²∑y²)
x = (X – Mean)
y = (Y – Mean)
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
Coefficient of Correlation = 24 / √(42 x 42)
Coefficient of Correlation = 24 / √(1764)
Coefficient of Correlation = 24 / 42
Coefficient of Correlation = 0.5714
= (1/3 × 4/5) + (1/5 × 2/3)
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
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