The average weight for a group of 20 women is 130 pounds.If the average weight for 3/4 of these women was 140 pounds,what was the average weight,in pounds,for the rest of thee women?
2 answers
100 lbs.
Lets check
100*5/20+ 140*15/20= 25+105=130 lbs
it checks.
Now you could have solved it this way, in the place of 100 you put X
X*5/20+140*15/20=130 and solve for X
100*5/20+ 140*15/20= 25+105=130 lbs
it checks.
Now you could have solved it this way, in the place of 100 you put X
X*5/20+140*15/20=130 and solve for X
3 answers