Question

A bag contains 5 blue balls and x red balls. If the probability of drawing a red ball is 2/3 then the number of balls in the bag is

Answer 1

Answer:

15

Step-by-step explanation:

Acc to question

x/5+x=2/3

3x=10+2x

x=10

Total number of balls=5+10=15

Hope it helps

Answer 2

Number of blue balls = 5

Number of red balls = x

Total number of balls = x+5

Probability (getting a red ball) = 2/3

x/(x+5) = 2/3

By cross multiplication:-

3x = 2(x+5)

3x = 2x+10

3x-2x = 10

x = 10

Number of red balls = 5+x

Total number of balls = 5+x

= 5+10

= 15 balls