In the following sentence:
One out of ten people speaks (English) as their mother tongue
Is "one out of ten" considered singular, or should speaks be changed to speak?
In the following sentence:
One out of ten people speaks (English) as their mother tongue
Is "one out of ten" considered singular, or should speaks be changed to speak?
I would say it is definitely singular. If you think about it, 'one' is the subject of the sentence, whilst 'out of ten people' is a subordinate clause and could be separated by commas as in:
'One, out of ten people, speaks English'. 'Two, out of ten people, hate broccoli'.