SOLUTION: Mr White purchased some bottles of mineral water for his son. After a week, he
used 4/7 of the bottles leaving 6 bottles.
(i) Find the fraction of the bottles of mineral water t
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Question 1195902: Mr White purchased some bottles of mineral water for his son. After a week, he
used 4/7 of the bottles leaving 6 bottles.
(i) Find the fraction of the bottles of mineral water that remain after a week.
(ii) How many bottles of mineral water did he purchased that week?
Answer by math_tutor2020(3817) (Show Source): You can put this solution on YOUR website!
He uses 4/7 of the bottles, so he must have 3/7 of them left.
x = number of bottles purchased
3/7 of x = (3/7)x = 6 bottles left
Solve for x.
(3/7)x = 6
3x = 6*7
3x = 42
x = 42/3
x = 14
If he bought 14 bottles and has 6 left over, then he must have used 8 of them (14-6 = 8).
Note how 8/14 = (2*4)/(2*7) = 4/7 represents the fraction of the bottles used up to confirm we have the correct x value.
Answers:
(i) 3/7
(ii) 14
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