Answer:
<u>The correct answer is 11 years</u>
Step-by-step explanation:
Summer Olympics every 4 years
US Senator runs for reelection every 6 years
Both events occurred last year
Next Summers Olympics in 3 years, 7 years, <em><u>11 years</u></em>, 15 years, 19 years, <em><u>23 years.</u></em>
Next US Senator reelection in 5 years, <em><u>11 years</u></em>, 17 years, <em><u>23 years.</u></em>
<u>The next time US Summer Olympics and the US Senate will take place the same year, will be exactly in 11 years.</u>