How would you tackle this :
- Having à Crowd of 600 sitting
- let them chose à color on their phone (4 possibilités)
- have people show their phones
- take à picture of the audience and count the Colors<p>Does it seem feasible ? Where would you start for the counting ?
Make an app with the colours on. People download the app and enter a code to join the audience. You count the colour selections reported by the app not from a picture. You can still get them to hold up the colours because sometimes you can tell at a glance the most common colour.