Question

Which sounds better?

How many of you have known someone that has attempted or completed suicide before?

or

How many of you have known someone that has attempted or taken their own life from suicide before?

Answer 1

Do you really want a count? If not, then

Have you ever known someone...

Answer 2

If you want it phrased better (and grammatically correctly) --

<i>Have you ever known someone who has attempted or committed suicide?</i>

1. Wordiness hinders your reader/listener from understanding what you are really asking. Aim for concise phrasing.
http://grammar.ccc.commnet.edu/grammar/concise.htm

2. "someone" is singular; "their" is plural -- see the problem?
http://grammar.ccc.commnet.edu/grammar/pronouns.htm

Answer 3

e`````````````
g.gugyigugugyre5awesrdytfughi