Question

There are 60 students in a speech contest. Yesterday,
2/3 of them gave their speeches.
Today, 1/5 of the remaining students gave their speeches. How many students still haven't given their speeches?

Answer 1

hint: what is 2/3 of 60?

Answer 2

40?

Answer 3

Right. Evaluate (2/3)*60.

Then for today, mult. your result by 1/5.

Answer 4

8?

Answer 5

good, so the number left is 60 - 40 = 20

then multiply 20 by 1/5

Answer 6

Yes. So, how many students, total, have already given their speeches? How many have not?

Answer 7

52 have and 8 have not?

Answer 8

I'm afraid we're going to have to backtrack.

Yesterday 2/3 rds of the 60 students gave their speeches, leaving how many who had not? It's not 40. Think thru this, please.

Answer 9

Please refer to Vocaloid's most recent post. It's correct.

Answer 10

@skull patrol: Your response and vocaloid's disagree. Please work this out directly with Vocaloid.

Answer 11

The issue here is: After yesterday, how many students had NOT yet given their speeches?

Answer 12

"Vocaloid Mathlete Best Response Medals 1
good, so the number left is 60 - 40 = 20

then multiply 20 by 1/5"

Answer 13

There are 60 students in a speech contest.

Yesterday, 2/3 of them gave their speeches. $$2/3(60) = 40$$

Today, 1/5 of the remaining students gave their speeches. $$60-40 = 20$$ $$1/5(20) = 4$$

How many students still haven't given their speeches? $$60 – 40 – 4 = ?$$

Answer 14

Nice work. But I have also recognized Vocaloid for having suggested this approach earlier.

@eleanorbrit11488 : Can you now finish this problem?