Answer should be D, as stat. (2) also gives you a foothold in reality - it tells you that the difference between Dan and Joe (4-1=3 ratio units) corresponds with a difference of 21 hours in Reality. So the multiplier between ratio and reality is *7, which applies across the board:MI3 wrote:Q: Joe, Bob and Dan worked in the ratio of 1:2:4 hours, respectively. How many hours did Bob work?
(1) Together, Joe, Bob and Dan worked a total of 49 hours.
(2) Dan worked 21 hours more than Joe.
IMO - A, am I correct?
A ratio of 1:2:4 expanded times 7 will yield a real number of hours of 7:14:28, and only this ratio will satisfy the condition for the difference of 21 hours. From this, we can infer tha Bob worked for 14 hours.
