Answer:
The number of the students is 20.
Step-by-step explanation:
Total number of students in the speech contest = 90
Number of students that gave their speeches yesterday = [tex]\frac{2}{3}[/tex] of 90
= [tex]\frac{2}{3}[/tex] x 90
= 60
Number of remaining students who have not given their speeches after the first day = 90 - 60
= 30
Number of students that gave their speeches today = [tex]\frac{1}{3}[/tex] of 30
= [tex]\frac{1}{3}[/tex] x 30
= 10
Number of students that have not given their speeches = 30 - 10
= 20
Thus, 20 students have not given their speeches.
