How many extra points are Scrabble players awarded for using all seven of their letters?

Question

I need it for a bonus question answer on a test tomorrow.

Answer 1

50

Answer 2

50.  They are added only after the word is scored, so you don't get  the bonus tripled if you word is on a triple word square.

The term serious Scrabble players use for using all the letters is "Bingo."  No one is sure why.

Answer 3

You get 50 extra points when you play all seven of your letters in one turn.