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If 2 A=3 B2 mathrm{~A}=3 mathrm{~B}, then what is the value of (A+B)A?frac{(mathrm{A}+mathrm{B})}{mathrm{A}} ?

a

54frac{5}{4}

b

53frac{5}{3}

c

23frac{2}{3}

d

52frac{5}{2}

Answer : Option B
Explanation :

2 A=3 B2 mathrm{~A}=3 mathrm{~B}

2 A6=3 B6Rightarrow frac{2 mathrm{~A}}{6}=frac{3 mathrm{~B}}{6}

A3=B2=kRightarrow frac{mathrm{A}}{3}=frac{mathrm{B}}{2}=mathrm{k}

A=3k;B=2k herefore mathrm{A}=3 mathrm{k} ; mathrm{B}=2 mathrm{k}

A+BA=3k+2k3k=5k3k=53 herefore frac{mathrm{A}+mathrm{B}}{mathrm{A}}=frac{3 mathrm{k}+2 mathrm{k}}{3 mathrm{k}}=frac{5 mathrm{k}}{3 mathrm{k}}=frac{5}{3}

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