Answer:
Number of students who to prefer to practice after school are:
84
Step-by-step explanation:
Seven of ten students polled say that they prefer to practice for a team sport after school than before school.
this implies that 7/10 part of the population prefer to practice for a team sport after school than before school.
Population of school=120
Hence, number of students who to prefer to practice after school are
7×120/10
= 84
Hence, 84 students prefer to practice after school