At a certain hospital, 75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts. At the same time, 70% of the interns who receive 6 or more hours of sleep report no feelings of tiredness. If 80% of the interns receive fewer than 6 hours of sleep, what percent of the interns report no feelings of tiredness during their shifts?
Please show the working.
I didn't get any of the answer choices...got 34
Set Total = 100
More than or equal 6 hours of sleep = 20
Not Tried: 70/100 * 20 = 14
Less than 6 hours of sleep = 80
Not Tried: 25/100 * 80 = 20
Total Not Tried = 14+20 = 34
Don't know what's wrong.