Question

If 4  tables are needed for 12 students .How  many tables will needed for 21 students. ​

Answer 1

tables needed for 12 students = 4

no. of students sitting on 4 tables = 12

no. of students sitting on each table =

$12 \div 4$

= 3

no. of students sitting on 21 tables =

$21 \div 3$

=7

Therefore, 7 tables are needed for 21 students.