If 6 * 9 - 4 = 58 and 3 * 9 - 7 = 34, then in the expression A * 4 - 9 = 91, what is the value of 'A'?
The pattern is that $$'-'$$ is treated as $$'+'$$
Eg : $$6\times9+4=58$$
and $$3\times9+7=34$$
Similarly, $$A\times4+9=91$$
=> $$4A=91-9=82$$
=> $$A=\frac{82}{4}=20.5$$
=> Ans - (C)
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