Question

A bag contains 6 white, 5 green, 4 blue and a few red balls. Further 2 more red balls are added in the bag. If a ball is now drawn at random and the probability of drawing a red ball 0.5, then determine the total number of red balls present in the bag after adding the 2 red balls

Answer 1

Answer:13 red balls are there

Step-by-step explanation:

let the number of red balls be x+2

the total number of balls are=6+5+4+x+2

                                               =17+x

probability=x+2/17+x

0.5=x+2/x+17

0.5*(x+17)=x+2

0.5x+8.5=x+2

0.5x-x=2-8.5

0.5x=6.5

x=6.5/0.5

x=13

therefore there are 13 red balls