Question

Mark the correct alternative in the following question:

If the cost of 12 books is ₹144, then the cost of 18 books is

(a) ₹206 (b) ₹216 (c) ₹198 (d) ₹180

Answer 1

As, the cost of 12 books = ₹144

⇒ The cost of 1 book = $\frac{144}{12}$ = ₹12

So, the cost of 18 books = 12 × 18 = ₹216

Hence, the correct alternative is option (b).