Question

A bag contains 5 blue balls and some red balls if the probability of drawing a red ball from the bag is thrice that of blue ba;; find the number of red balls in the bag

Answer 1

let the bag contains x no. of red balls. so total no. of ball =x+5. So the probability of drawing blue balls=5÷(x+5)...The probability of drawing red ball=x÷(x+5). .... According to question.... 3×5÷(x+5)=x÷(x+5).... solve it for x ...

Answer 2

Answer:

Step-by-step explanation:

blue balls= 5

let red balls= X

probability of blue balls = 5 / 5 + X

according to question :-  X /( 5 + X ) = 3( 5 ) / ( 5 + X )       (find value of X)

                                       X = 15

              so number of red balls is = 15