its called mutual gravitational attraction,

I learned something new today, thanks for sharing.

Yes, you are right. 4 out of five are. MORE
Binary Star Systems: Classification and Evolution
In the binary system J0806, two white dwarf stars orbit one another every 321 seconds. Scientists think the stars, about 1,600 light-years away, are spiraling in toward one another and will eventually merge.
Credit: NASA/Tod Strohmayer (GSFC)/Dana Berry (Chandra X-Ray Observatory)
More than four-fifths of the single points of light we observe in the night sky are actually two or more stars orbiting together. The most common of the multiple star systems are binary stars, systems of only two stars together.

I think you made a mistake. 3 of every 2 stars is pretty impossible.