CTET 2 Math and Science 2011 Paper

Question : 51 of 120

Marks: +1, -0

4/16 - 1/8 = 3/8
6/7 - 2/9 = 4/2
The above represents the work of a student. If this error pattern continues, the student's answer to 5/11 - 2/7 will be

7/18
3/4
3/7
2/18

Validate

Solution:

Given pattern is

\;\;{4}/{16}-\;\;{1}/{8}=\;\;{3}/{8},\;\;{6}/{7}-\;\;{2}/{9}=\;\;{4}/{2}

Rule : Subtract Numerator from Numerator. and Subtract Denominator from denominator. Hence,

\;\;{5}/{11}-\;\;{2}/{7}=\;\;{5-2}/{11-7}=\;\;{3}/{4}

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