Answer
See below.
Work Step by Step
a) The total number of outcomes in this sample: $50$, the number of outcomes satisfying the requirements in this sample: $29-5=24$, thus the probability: $\frac{24}{50}=\frac{12}{25}$
b) The total number of outcomes in this sample: $50$, the number of outcomes satisfying the requirements in this sample: $50-(29+11-5)=15$, thus the probability: $\frac{15}{50}=\frac{3}{10}$