Madelaine88 wrote:
Envelopes can be purchased for $1.50 per pack of 100, $1.00 per pack of 50, or $0.03 each. What is the greatest number of envelopes that can be purchased for $7.30?
A. 426
B. 430
C. 443
D. 460
E. 486
The 3 options:
$1.50 per pack of 100 =
1.5 cents per envelope
$1.00 per pack of 50 =
2 cents per envelope
$0.03 per individual envelope =
3 cents per envelope
Since the packs of 100 are the best value, let's buy as many of these as we can.
4 packs of 100 costs $6.00 (we still have $1.30 left to spend)
1 packs of 50 costs $1.00 (we still have $0.30 left to spend)
10 individual envelopes costs $0.30 (we've spent all of the money)
Number of envelopes purchased = 400 + 50 + 10 = 460
Answer: D
Cheers,
Brent
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