13. The price of two mobiles is in the ratio 9: 7. If the second mobile costs 6300,
what is the price of the first mobile?
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Answer is 8100Rs ( 9 × 900 = 8100Rs )
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Answer:
let price of first mobile be 9x
price of 2nd mobile be 7x
9x + 7x =6300
16x=6300
x= 6300/16=393.75
price of first mobile= 9*393.75=3543.75
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