Let me thank you in advance.
I am taking ( for my just blog purpose ) a listening test, which is, the gate examination to enter his/her university for entire students in our country. And I struck upon a very annoying problem? which is, whether speaker should end with either plural or singular. Kindly take a look at below.
( The listening test answer )
Woman : How many emails do you usually get a day?
Man : Around 90
Woman : That many?
Man : Yeah, but a third of them are junk mail.
Now I am wondering if the bold part is correct or not. I think "a third of them" takes singular, so that "are" should not be used as you can see the man ends up with singular. Personally, I think this is a mistake. Am I correct or not?
Thank you for your kind assistance in advance.