6 pencils cost ₹30 and 12 pens cost ₹120. What is the average cost of 50 pencils and 50 pens?
Answer & explanation
Correct answer: option 2
Total cost of 6 pencil = 30
Cost of 50 pencil = \(\frac{30}{6}\) × 50 = Rs250
Cost of 12 pens = 120
Cost of 50 pens = \(\frac{120}{12}\) × 50 = Rs500
Average of 50 pencils & 50 pens = \(\frac{500 + 250}{100}\) = Rs7.5