Question

If 8 pens cost ₹ 84 , how much does 14 pens cost ?

• A. ₹ 127
• B. ₹ 145
• C. ₹ 147
• D. ₹ 144

Answer 1

The correct option is C

₹ 147

Let the cost of 14 pens be x. Then,

Ratio of number of pens = Ratio of their costs

$\Rightarrow$ 8: 14 = 84 : x

In the proportion , product of extremes = product of means

$\Rightarrow$ $8\times x=14\times 84$

$\Rightarrow$ 8x = 1176

$\Rightarrow$ $x=\frac{1176}{8}$

$\Rightarrow$ x= ₹ 147