The correct answer is 2, and I'm from the UK.
48÷2(3+9) = 48÷2(12) = 48÷24 = 2
This answer is right becuase of BODMAS
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right