1.

Ild the6)tal cost of 5 books and 8number.The total cost of 8 books and 5 pens is 420 rupees and the total cost of 51pens is 321 rupees. Find the cost of 1 book and 2 pens.The ratio of incomes of two persons is 9 : 7. The ratio of their eyn-​

Answer»

Answer:

2:7

Step-by-step EXPLANATION:

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