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Byju's Answer
Standard XII
Mathematics
Cramer's Rule
89, 78, 86, 8...
Question
89, 78, 86, 80, 85, 82, 83
A
83
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B
82
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C
86
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D
78
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Solution
The correct option is
C
86
The correct pattern is - 11, + 9, - 7, + 5, - 3, + 1.
So, 86 is wrong and must be replaced by (78 + 9) i.e. 87.
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