How to read Treble clef in Bass clef

[user99]

Hi,

my question is how to play the notes in the attachment. There is the Bass Clef for the left hand and an Treble clef sign.

So what is correct to play?
Is the interval played as c' and g' (in One-Line Octave) or C and G (Great Octave)?

Thank you for your help

[zillybug]

You read it just the way it is written when a clef is placed in the opposite clef. In other words, it is middle c and g (a 5th). You will often find this in music. There will be another bass clef in the music when you are to return to the bass clef with your left hand. Hope this helps.
Judy

[user99]

thank you