1. The problem asks for the fraction of tennis club members aged 30 to 39 years old. 2. From the graph description, the number of tennis club members in each age group is: - 20 to 29: 4 members - 30 to 39: 12 members - 40 to 49: 4 members - 50+: 2 members 3. Calculate the total number of tennis club members: $$4 + 12 + 4 + 2 = 22$$ 4. The fraction of members aged 30 to 39 is the number in that group divided by the total number: $$\frac{12}{22}$$ 5. Simplify the fraction by dividing numerator and denominator by their greatest common divisor, which is 2: $$\frac{12 \div 2}{22 \div 2} = \frac{6}{11}$$ 6. Therefore, the fraction of tennis club members aged 30 to 39 years old in simplest form is: $$\frac{6}{11}$$