Question

a bag contains 5 red beads, 10 black beads, and 10 green beads. there are no other beads in the bowl. the probability to randomly choose a red bead is 20%. what is the probability you will not draw a red bead? 20% 30% 80% 90% 100%

Explanation:

Step1: Use complement rule

The probability of an event not occurring is $1 - P(\text{event})$.

Step2: Substitute given probability

$P(\text{not red}) = 1 - 0.20$

Step3: Calculate result

$P(\text{not red}) = 0.80 = 80\%$

Answer:

C. 80%