Question

the probability of selecting a red ball at random from a jar that contains only red , blue and orange balls is 1/4 .the probability of selecting a blue ball at random from the same jar is 1/3 . if the jar contains 10 orange ball , then find total number of balls in the jar .​

Answer 1

let total =x

we know that sum of all probability is 1

so

1/4 + 1/3+ 10/x=1

solve it