Jack wants to buy 17 identical pencils as follows.
1 for $4.506 for $23.40 What is the least amount of money she needs to buy 17 such pencils?
Maximum number of sets that Jack can buy
= 17 ÷ 6
= 2 r 5
Amount to pay for 2 sets of 6 pencils
= 2 x 23.40
= $46.80
Amount to pay for the remaining pencils not part of a set
= 5 x 4.50
= $22.50
Least amount that Jack needed to pay
= 46.80 + 22.50
= $69.30
Answer(s): $69.30