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120 children paid a total of $90 to gain entry into a park.

(a) What is the cost of 1 ticket of entry for a child?

(b) An entry ticket for an adult cost $0.25 more than an entry ticket for a child. If $90 was used to purchase entry tickets for adults instead of entry tickets for children, how many fewer adults than children could be admitted into the park?

Notes to student:

If the question above has parts(e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12