2020 WAEC GCE/WASSCE PRIVATE SECOND SERIES MATHEMATICS OBJ AND ESSAY QUESTIONS AND ANSWERS

MATHEMATICS OBJ

1BDBBBDCDCC

11AACCADA-AA

21DDBDADADAD

31AABAADCCDC

41CCBDAABACD

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SECTION A answer Five (5) only.

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(1)

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(2a)

Let cutlass = x and hoe = y

3x+2y = 85

2x+3y = 90

6x+4y = 170

6x+9y = 270

-5y = -100

y = -100/-5 = 20

:. 2x+3(20) = 90

2x = 90 -60 = 30

x = 30/2 = 15

Cutlass cost GHc15 and hoe cost GHc20

(2b)

y = k(x-4)(x-1) = 24

y = k(x²-5x+4) = 24

x =0

24 = k(4)

k = 24/4 = 6

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(3)

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(4a)

(4b)

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(5a)

12/25

Pr(even)=12/25

(5b)

Pr(prime) =9/25

(5c)

Pr(even or prime )

=12/25+9/25

=21/25

(5d)

Pr(both prime and even)

=9/25*12/25

=108/625

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Section B answer Five (5)

Only.

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(6)

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(8)

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(9)

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(10)

(10b)

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(11a) and (11b)

(11c)

Posted by admin on 21st November 2020.

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