# The probaility of selecting a red ball at random from a jar that contains only red,blue and orange ball is 1/4.The probability of selecting a blue ball at random from the same jar is 1/3.If this jar contains 10 orange balls,then what is the total number of balls in the jar?

then - no. of red balls = x*[1/4]

no. of blue balls = x*[1/3]

no . of orange balls = 10 [given]

so x = x[1/4] +x[1/3] + 10

= x/4 + x/3 +10

=[3x + 4x]/12 +10

= 7x / 12 +10

x =[7x + 120]12

[12] x = 7x +120

12x = 7x + 120

12x -7x =120

5x =120

x =120/5

x =24

so total balls =24