How to detect how many LOV values user selects on a WEBI Prompt

Hello Gurus,

Is there a way to identify how many LOV Values the user selects on a Webi prompt that allows multiple value selection?

For EG: If I have a webi and there's a prompt called State on the WEBI and the user selects "Utah", "Ohio" and "Texas" from the LOV and runs the query; is there a formula I can use to get the value as 3 (no.of selections)? If that's not possible, is there a way to find out if the user has selected more than 1 value?

Thanks,

RC