At a candy store you could get 2 giant lollipops for $4.48. How much would it cost to buy 7 lollipops?
1 answer:
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The two brothers can be seated together in 2! ways.
Therefore, the total number of ways is
Diagrammatically, the result is shown in the figure below. The two brothers are family members 3 and 4, shown in shaded color.
Answer: 12 ways.