Today Puzzle #771
Puzzle No. 771鈥� Monday 29 June
On holiday Pat says she’ll go and get snacks for nine friends and herself. At the beach shop a soft drink costs €1, ice creams are €2 and a beer is €3. If each person chooses only one item and Pat spends exactly €20, how many ways could the group select their snacks?
Today’s #PuzzleForToday has been set by Dr Steve Humble, Newcastle University
Click here for the answer
There are six different possible selections of snacks.
Details of a possible solution.
S + 2C + 3B = 20 – (1)
S+ C + B = 10 – (2)
Subtracting (2) from (1) gives C + 2B = 10
Re-write this equation as
C = 10 – 2B
Beer (B) Ice Cream (C) Soft drink (S)
0 10 0
1 8 1
2 6 2
3 4 3
4 2 4
5 0 5
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