Assume the cost of 1 pen is Rs. x , of 1 pencil is Rs. y .
ATQ
5x + 6y =Rs. 9.00 ...(i)
3x + 2y =Rs.5.00 ...(ii)
3xEquation (ii) - Equation (i)
9x + 6y - 5x -6y = 15 - 9
4x = 6
x = 3/2 => y = 1/4
Hence the cost of 1 pen is Rs 1.5 and of 1 pencil is Rs 0.25 .