The probability of a bead drawn at random being yellow or blue is 2/3
what is probability?
Probability is the likelihood or chance that an event will occur. Mathematically
Probability = Expected outcome/Total outcome
If a box contains 20 red, 10 blue and 30 yellow beads, the total number of beads are;
Total outcome = 20 + 10 + 30
Total outcome = 60
Pr(a yellow) = 30/60 = 1/2
pr(a blue) = 10/60 = 1/6
Pr(yellow or blue) = 1/2 + 1/6 = 2/3
Hence the probability of a bead drawn at random being yellow or blue is 2/3
Learn more on probability here: https://brainly.com/question/24756209
