Question:The average price of these items of furniture is Rs `15000`.If their prices are in the raatio `3:5:7`,the price of the cheapest items is: 

A `Rs 9000` 
B `Rs 15000` 
C `Rs 18000` 
D `Rs 21000` 

+ Answer
A 

+ Explanation
Let thier prices be `3x,5x`and `7x`.

Then,`3x + 5x + 7x`

`= (15000 xx 3)`

`or x = 3000`.

Cost of cheapest item

`= 3x = Rs 9000`

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Irin Moni

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