A) 11
B) 7
C) 4
D) 3
Correct Answer: C
Solution :
According to the question, \[4a+5b=83\] ...(i) and \[\frac{3a}{2b}=\frac{21}{22}\Rightarrow \frac{a}{b}=\frac{7}{11}\] \[\Rightarrow \] \[11a-7b=0\] ...(ii) By solving Eq. (i) and Eq. (ii), we get \[b=\frac{913}{83}\]and\[a=7\] \[\therefore \]\[b-a=11-7=4\]You need to login to perform this action.
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