Mathematics · May / June 2025 · Paper 42 · Question 10
0580
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0580/42/M/J/25 © UCLES 2025 10 A group of 12 adults and 9 children travel on a bus. The cost of an adult ticket is $ď. The cost of a child ticket is $( ) ď 10 Â . The total cost of the tickets is $277.50 . Find the cost of one adult ticket. $ [3]
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17.5[0] cao [3]
M1 for 12n + 9(n – 10) = 277.50 oe M1 dep on their equation using n and n – 10 for simplifying their equation correctly to an = b
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