Multiple choice

There are $20$ balls in a bag.The no.of red balls is $7$ no.of yellow balls are $5$ remaining are green balls .Find the probability of picking a green ball.

  1. $\dfrac{1}{2}$
  2. $\dfrac25$
  3. $\dfrac{4}{9}$
  4. none

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total balls = 20. Red = 7, Yellow = 5. Green = 20 - (7 + 5) = 8. Probability of green = 8/20 = 2/5.

AI explanation

First, determine the number of green balls by subtracting the red and yellow balls from the total, which is 20 - 7 - 5 = 8 green balls. The probability of an event is the ratio of favorable outcomes to the total number of outcomes. Therefore, the probability of picking a green ball is 8/20, which simplifies to 2/5.