Daniel went to a shop and bought things worth Rs. 50, out of which 90 Paise went on sales tax on taxable purchases. If the tax rate was 15%, then what was the cost of the tax free items?  Pick.
A) A)19.7 B) B)20 C) C)43.1 D) D)21.5 E) E)22
Total cost of the items he purchased = Rs.50   Given that out of this Rs.50, 90 Paise is given as tax   =&gt; Total tax incurred = 90 Paise = Rs.90/100   Let the cost of the tax free items = x   Given that tax rate = 15%   ∴ (50−90/100−x)15/100 = 90/100   ⇒ 15(50 −0.9 −x) = 90   ⇒ (50 − 0.9 − x) = 6   ⇒ x = 50 − 0.9 − 6   = 43.1   43.1
<result>C</result>
Daniel went to a shop and bought things worth Rs. 50, out of which 90 Paise went on sales tax on taxable purchases. If the tax rate was 15%, then what was the cost of the tax free items?