Asked by Connie (g/ma)
I am lost.
Question: Blake bought 21 books. The least he spent for a book was $18. The most he spent for a book was $25. What could be the amount that he ended up paying for his books?
a.$375
b.$530
c. $175
d. $445
Question: Blake bought 21 books. The least he spent for a book was $18. The most he spent for a book was $25. What could be the amount that he ended up paying for his books?
a.$375
b.$530
c. $175
d. $445
Answers
Answered by
Reiny
Ahhh, great question!!!!
We know two of the prices, the high and the low, which is a total of $43.
So the average price of the remaining 19 books must be > $18 and < $25
(375-43)/19 = 17.5 no good
(530-43)/19 = 25.6 no good
(175-43)/19 = 6.9 no good
<b>(445-43)/19 = 21.1 YUP!, that's it.</b>
We know two of the prices, the high and the low, which is a total of $43.
So the average price of the remaining 19 books must be > $18 and < $25
(375-43)/19 = 17.5 no good
(530-43)/19 = 25.6 no good
(175-43)/19 = 6.9 no good
<b>(445-43)/19 = 21.1 YUP!, that's it.</b>
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