To calculate the probability of picking a green ball randomly, divide the number of green balls by the total number of balls.
Daisy has 4 green balls and 4 white balls, which makes a total of 8 balls.
Probability of picking a green ball = (Number of green balls) / (Total number of balls) = 4 / 8
Simplifying the fraction, we get:
Probability = 1 / 2 or 0.5
So, the probability of picking a green ball randomly is 1/2 or 50%.