1 sticker costs $6.
For every 10 stickers bought, a discount of $7 is given.
- How much do 10 stickers cost?
- How much do 17 stickers cost?
- How much do 33 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 6 - 7
= 60 - 7
= $53
(b)
Number of stickers that do not belong to a set
= 17 ÷ 10
= 1 r 7
Cost of the 7 extra stickers
= 7 x 6
= $42
Cost of 17 stickers
= 53 + 42
= $95
(c)
Number of sets of 10 stickers
= 33 ÷ 10
= 3 r 3
Cost of 30 stickers
= 3 x 53
= $159
Cost of 3 stickers
= 3 x 6
= $18
Cost of 33 stickers
= 159 + 18
= $177
Answer(s): (a) $53; (b) $95; (c) $177