Answer:
a) 28 quarters
b) 14 quarters
Step-by-step explanation:
We are given the following in the question:
Number of quarters = 20 quarters
Number of quarters in room = 40%
Total number of quarter in room =
[tex]=40\%\times (20)\\\\=\dfrac{40}{100}\times 20\\\\=8[/tex]
Thus, the total quarters taken to shopping =
[tex]=20 +40\%\times (20)\\\\=20+8\\=28[/tex]
Thus, 28 quarters were taken to shopping.
Quarter spent on shopping = 50%
Total number of quarter spent in shopping =
[tex]=50\%\times (28)\\\\=\dfrac{50}{100}\times 28\\\\=14[/tex]
Money left =
Money taken for shopping - Money spent
[tex]= 28-14\\=14[/tex]
Thus, we are left with 14 quarters after shopping.
