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If 23y = 1111two , find the value of y A. 7 B. 6 C. 5 D....
waec-2019 ssce-exam-2019 waec-mathematics-2019 math
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if 23y = 1111two , find the value of y

A. 7

B. 6

C. 5

D. 4

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peter
Asked by peterrep:1.8K
University of Lagos Nigeria
04 May 2020

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judziy
Judziy answeredrep:2.0K
University of Benin Nigeria
22 August 2020
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First, convert both sides to same base (in this case base 10)

 2 x y1 + 3 x y0 = 1x23 + 1x22 + 1x21 + 1x20

2y + 3 = 8 + 4 + 2 + 1

2y + 3 = 15

2y = 15 - 3

2y = 12

y = 12/2

y = 6

Ans B

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Kate11, Great achievers school
Ans here is c
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peter, University of Lagos
@Kate11 You're wrong. Its B
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,
Correct
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