I got really confused reading conflicting grammar rules for sentences such as below:
First one:
A number of people is/are going to the party.
Here, the subject is "A number". Since "A number" is plural, the the correct answer must be
A number of people are going to the party.
Second one:
His collections of music is/are good.
Here, the subject is "Collections of music". Since "collections" is a plural, the correct answer must be:
His collections of music are good.
Third one:
His collection of music is/are good.
Going by my previous rule, since the subject here is "collection of music", which is singular, the correct answer must be:
His collection of music is good
But I have seen answers that state the right answer to the second one is "His collections of music is good".
Can someone please elucidate this?
Thanks in advance!