--------- will watch the ceremony.

Source: Common Mistakes at IELTSA. three and a half billion

B. three and a half of a billion

Book's answer: A

My answer: Both of them are correct.

Which one is correct to you? And why?

Thanks.

- Thread starter Mnemon
- Start date

--------- will watch the ceremony.

Source: Common Mistakes at IELTSA. three and a half billion

B. three and a half of a billion

Book's answer: A

My answer: Both of them are correct.

Which one is correct to you? And why?

Thanks.

Nobody would ever say 'three and a half of a billion'.

We say one and a half, two and a half, three and a half . . . etc. And one and a quarter, two and three quarters, five and a third . . . etc.

Hmm... interesting. What do you thinkMy answer: Both of them are correct.

The only thing it would mean to me is a proportion. "On the average, three and a half of a billion people inherit the ABCD gene from both parents." (Obviously, there is no such thing as half a person, but in statistics that doesn't matter. People often say things like "the average family has 2.5 children and 0.3 dogs.") That might not be the best way to say this - I'd probably say "about one person in 290 million" - but that's what it would mean to me.Hmm... interesting. What do you think"three and a half of a billion"means?

Ditto.And I saw it as a weird way of saying the number 500,000,003.