Which interval indicates 7-11 contacts?

• A. 0-10 yards
• B. 20-30 yards
• C. 10-20 yards
• D. 30-40 yards

Answer: (C)

When you map a range to a single interval, use the interval that contains the upper end of the range. For 7-11, the highest value is 11, which sits in the 10-20 yards interval. That interval best represents the range because it includes the extreme value of the range. The 0-10 yards interval only covers up to 10, so it misses the 11. The other intervals don’t overlap the range at all.