Question

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bags is four times that of a red ball, find the number of blue balls in the bag.

Answer 1

Answer:

$\huge\fcolorbox{black}{pink}{Answer-}$

Let the number of red balls be x and blue balls be y .

Therefore ;

According to the condition ,

x = 5

P (Blue ) = 4 × P ( red balls )

P ( blue ) = 4 × 5

P ( blue ) = 20

Terefore ,

number of blue balls are 20

Answer 2

Answer:

$\huge\fcolorbox{black}{pink}{Answer-}$

P ( blue ) = 4 × P ( red )

= 4 × 5

= 20