Question

According to a recent office survey of coffee preferences, 15% of the coworkers preferred Columbian, 35% perferred Brazilian, and 20% perferred decaf. If each coworker perferred only 1 option, and 150 coworkers don't drink coffee, how many coworkers were surveyed?

Answer 1

500

Answer 2

ok

Answer 3

want an explanation?

Answer 4

yes plz

Answer 5

15% + 35% + 20% = 70%

so 30% of those asked didn't drink coffee

so 150 = 30%. From here lots of ways to do. The way i'd do it in my head would be

150/3 gives 50 as 10%. So 50*10 is 100% of people asked =500

Answer 6

ahh.now i c. thanx

Answer 7

np