# WAEC 2020/21 Mathematics Obj & Essay Questions /Answers

WAEC 2020/21 Mathematics Obj Answers | WAEC 2020/21 Mathematics Obj Questions | WAEC 2020/21 Mathematics Obj questions runz | WAEC 2020/21 Mathematics Obj Answers expo.

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MATHS-OBJ
1-10: CBCDACDCCD
31-40: CDACCCCCDA
41-50:BBBCDCACDB

Completed.

💪💪💪💪🇳🇬🇳🇬🇳🇬🇳🇬
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DONE AND DUSTED FOR TODAY. ✅

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(1a)
Given A={2,4,6,8,…}
B={3,6,9,12,…}
C={1,2,3,6}
U= {1,2,3,4,5,6,7,8,9,10}
A’ = {1,3,5,7,9}
B’ = {1,2,4,5,7,8,10}
C’ = {4,5,7,8,9,10}
A’nB’nC’ = {5, 7}
(1b)
Cost of each premiere ticket = \$18.50
At bulk purchase, cost of each = \$80.00/50 = \$16.00
Amount saved = \$18.50 – \$16.00
=\$2.50

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2ai).
p = (rk/Q -ms)2/3
p3/2 = (rk/Q -ms)2/8 * 3/2
p3/2 = rk/Q = ms
p3/2 + ms = rk/Q
q(p3/2 + ms ) = rk
Q =rk/p3/2 + ms
2aii)
Where :
r = 10, k = 4, s = 0.2
p = 3, m = 15
Q = 10 * 4/3^3/2 + (15 * 0.2)
Q = 40/5.2 + 3
Q = 40/8.2
Q = 4.88
[8/17, 10:36 AM] OfficalSkidoblackly: *2bi* 2mn^2x/(3m-n)
But m= 3 n = -2 x= -1
= 2*3*(-2)^2*(-1)/3(3)-(-2)
= 2*3*4*-1/9+2
= -24/11
=2. 2/11

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(5a)
Total income = 32+m+25+40+28+45
=170+m
PR(²)=m/170+m = 0.15/1
M=0.15(170+m)
M=25.5+0.15m
0.85m/0.85=25.5/0.85
M=30
(5b)
Total outcome = 170 + 30 = 200
(5c)
PR(even numbers) = 30+40+50/200
=115/200 = 23/40

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11b) 8y = – 4x + 24
Y = – 4/8 x + 24/8
Y = – 1/2 x + 3
Gradient = m = – 1/2
:. Y- y1 = m(x-x)
Y- 12 = 1/2 (x + 8)
2(y-12) = 1 (x+8)
2y – 24 = -x-8
X + 2y – 24 + 8 = 0
X + 2y – 24 + 8 = 0
X + 2y – 16 = 0
Is the line above

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