1.

A bag contain 5 red balls andsome bue ball. If the probablityof drawing a blue ballis thrice that of red ball find the number of blue balls in a bag​

Answer»

Answer:

10

Step-by-step explanation:

Let the no. of BLUE ball be X

No. of red balls = 5

Total no. of balls = No. of blue balls + No. of red balls = X + 5

Probability of getting blue balls = X/(X+5)

Probability of getting red ball = 5/(X +5)

A/q,

X/(X+5) = (2*5)/(X+5)

Cancelling X+5 from both terms as they are common,

X = 10

So, there are 10 blue balls in the bag.

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