Question 11An envelope contains eight bills: $2$ ones, $2$ fives, $2$ tens, and $2$ twenties. Two bills are drawn at random without replacement. What is the probability that their sum is $\$20$ or more?$\dfrac{1}{4}$$\dfrac{2}{7}$$\dfrac{3}{7}$$\dfrac{1}{2}$$\dfrac{2}{3}$