Answer: 12
Explanation:
A Stem and Leaf Plot is a particular table in which each data value is split into a "stem" (the first digit ) and a "leaf" (the last digit).
The given stem-and-leaf plot shows the test scores for a chemistry class in which , the numbers less than 82 are 52, 64, 66, 70, 71, 74, 76, 78, 78, 78, 80, 8 1
Therefore, the number of students had a score less than 82 points = 12