the ratio of incomes of two persons is 9:7and the ratio of their expenditure is 4:3 if each of them manages to save Rs 200 per month find their monthly income.
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Step-by-step explanation:
Six salivary glands, located around the oral cavity, secrete saliva. This substance moves out of the glands into the oral cavity through ducts. Saliva is 99% water, but also contains enzymes and proteins that lubricate the oral cavity and begin chemical digestion of food.
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