Let the number of boys = x
and the number of girls = y
Now, table for x + y – 10 = 0
On plotting points on a graph paper and join them to get a straight line representing x + y – 10 = 0.
Similarly, on plotting the points on the same graph paper and join them to get a straight line representing x – y + 4 = 0.
∴ x = 3, y = 7 is the solution of the pair of linear equations.
Hence, the required number of boys is 3 and girls is 7.
