I have these 3 ratings. I want to combine them to produce an overall rating out of 5. The overall rating can be a float, so no rounding is necessary, but it cannot be negative. I'm just not sure how to do it.
Technical Rating from 1 to 5, weighting 2:1 (i.e A rating of 5 equals 10)
Production Rating from 1 to 5, weighting 1:1
Content Rating from 1 to 5, weighting 3:1
Any hints or advice would be awesome, thanks.