Question

some children compared how many thank - you notes they wrote last month. writing thank - you notes. how many children wrote at least 1 thank - you note? children

Explanation:

Step1: Count children with 1 note

Count X's at 1: 9.

Step2: Count children with 2 notes

Count X's at 2: 5.

Step3: Count children with 3 notes

Count X's at 3: 6.

Step4: Sum the counts

Sum: \( 9 + 5 + 6 = 20 \).

Answer:

20