Discussion
Which one of the following costs least ?
Answer: B
The cheapest is 750 packets of ₹ 7.50 each.
\[ \begin{aligned} 75 \times 750 &= 56250 \\ 750 \times 7.50 &= 5625 \\ 90 \times 750 &= 67500 \\ 900 \times 7.50 &= 6750 \end{aligned} \]
Here 7.5 dozen is 90 items and 75 dozen is 900 items. The second option costs ₹ 5625, the least; 75 dozen at ₹ 7.50 (₹ 6750) is close but slightly more.
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