Answered

There are




80

students in a speech contest. Yesterday,




1


4

of them gave their speeches. Today,




2


5

of the remaining students gave their speeches. How many students still haven't given their speeches?

Verified Answer :

diene

yesterday, 1/4 of 80 =20 gave their speeches, so there are 80-20=60 students left.
Today, 2/5 of 60=24 students gave their speeches, so there are 60-24=36 students who still haven't give their speeches
another way to think of it is 80(1- 1/4)(1- 2/5)=80(3/4)(3/5)=36

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