(1 pt) Rework problem 25 from section 1.3 of your text, involving a drug marketing survey. Assume that 160 surveys are completed. Of those surveyed, 75 responded positively to effectiveness, 76 responded positively to side effects, and 78 responded positively to cost. Also, 34 responded positively to both effectiveness and side effects, 41 to effectiveness and cost, 39 to side effects and cost, and 24 to none of the items.
2006-09-08 02:28:08 · 5 answers · asked by Anonymous in Education & Reference ➔ Homework Help
How many responded positively to all three?
2006-09-08 02:28:32 · update #1
The answer is 21.
First, deduct 24 from 160. This leaves 136 surveys with the 3 responses.
136 = (75+76+78) - (34+41+39) - [The answer you are looking for]
After shifting the equation, you will get:
The answer = (75+76+78) - (34+41+39) - 136
= 229 - 114 - 136
= 21
2006-09-08 05:11:29 · answer #1 · answered by d_idealist 1 · 1⤊ 0⤋
21
2006-09-08 10:33:50 · answer #2 · answered by J S 3 · 0⤊ 0⤋
Oh! Come on! Someone answer this. I don't get it. The only thing I CAN figure out is that ESC<=34. And that's not much help..... (Math class seems so long ago right now) :-(
2006-09-08 10:19:05 · answer #3 · answered by EC-S 3 · 0⤊ 0⤋
You answer it.We're not here to do your homework
2006-09-08 09:29:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
you have all the data figure it out your self, dont waste our time... ;)
2006-09-08 09:33:12 · answer #5 · answered by Pummi 4 · 0⤊ 0⤋