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Two bananas and one guava cost Rs. 7. Three bananas and two guavas cost Rs 12. What is the cost of one guava? 
1. Rs. 2
2. Rs. 3
3. Rs. 5
4. Rs. 7

1 Answer

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Correct Answer - Option 2 : Rs. 3

Given : 

The cost price of 2 bananas and 1 guava = 7 Rs. 

The cost price of 3 bananas and 2 guava = 12 rs. 

Calculation :

Let the price of one banana be x and that of one guava be y

2x + y = 7      ----(1)   

According to the question,

3x + 2y = 12      ----(2)

Multipling equation (1) by 3 and (2) by 2, after subtracting them we get,

(6x + 3y) - (6x + 4y) = 21 - 24

⇒ - y = - 3

⇒ y = 3

∴ The cost price of 1 guava is Rs. 3.

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