**Shreyans Malani:** 5.057%

**Chinmay Sangoram:** About 5 – 5.5%

**David Geof:** no one has right answer yet – hint use geometric mean

**Lawrence Tedeschi:** That is the right formula, and all the numbers are correct..

**David Geof:** Ignore my previous comment – Shreyans got it right first. Bonus internet points for you and slap on wrist for me for doing calculations over lunchtime beers ðŸ˜‰

**Khetran Hashmat Khan:** 5.04%