How would I translate this phrase?

Question

They will not know what to do.

Ellos no sabrán qué hacer.

Is that correct? I'm not sure how to say "what to do".

Answer 1

It's correct.

• Thank you!!! - rooky Feb 8, 2010

Answer 2

Another possibility?

Ellos no sabrán lo que hacer.

• no,not really,maybee sabrían lo que tendrían que hacer - 00769608 Feb 9, 2010