kdhong
In a certain warehouse, 60 percent of the packages weigh less than 75 pounds, and a total of 48 packages weigh less than 25 pounds. If 80 percent of the packages weigh at least 25 pounds, how many of the packages weigh at least 25 pounds but less than 75 pounds?
A. 8
B. 64
C. 96
D. 102
E. 144
If 80% of the packages weigh at least 25 poundsThis means that 20% of the packages weigh LESS THAN 25 pounds
Let T = TOTAL number of packages
So, 20% of T = # of packages that weigh LESS THAN 25 pounds
48 packages weigh LESS THAN 25 poundsGREAT. So, 20% of T = 48
Rewrite to get: 0.2T = 48
Solve:
T = 24060% of the packages weigh less than 75 poundsSo, 60% of
T = number of packages that weigh less than 75 pounds
60% of
240 =
144, so
144 packages weigh less than 75 pounds
OF THOSE
144 packages that weigh less than 75 pounds,
48 packages weigh less than 25 pounds.
So, the number of packages that weight BETWEEN 25 and 75 pounds =
144 -
48 = 96 = C
Cheers,
Brent