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.