Answer:
36
Step-by-step explanation:
If 1/3 of 90 students gave a speech, then 60 students remain since 90 - 1/3 is 60.
2/5 of 60 can be written like this:
60 divided by 5 then multiplied by 2
which is 12 multiplied by 2
which is 24.
So currently there is 24+30=54 students who have given a speech.
90-54=36.
36 students haven't given a speech yet.
