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?

@ Adarsh is correct.

Thank u so much Adarsh:)

thankssss

probability of red ball ( 1/4) 

probability of blue ball ( 1/3 )

total orange balls = 10

now 

probability of orange ball = 1 - ( 1/4 ) - ( 1/3 )   [ all the probabilities sum up to 1 ]

let total balls be x 

 1 - ( 1/4 ) - ( 1/3 ) = [ 12 - 3 - 4 ] / 12 

= 5 / 12 

5x/12 = 10 [ probablity of orange ball is no of orange balls / total balls ]

=> x = 12*10 / 5 = 24 ....

hope this was simpler :)

 

Thanks adarsh@@

Thanks.

I have also got the same....

Your Intelligence is my common sense

thank u
 

Thanku

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

Ans:24

same as adarsh