# Calculus

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A group of tourists went to Sentosa. The total fare is \$240. If 10 more tourists join the tour each will pay \$4 less. Find the original number of tourists in the group

• Calculus -

If there are n tourists, the cost each is 240/n

240/n - 4 = 240/(n+10)
n=20

check:
240/20 = 12
240/30 = 8 = 12-4

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