The number of each type of ticket is sold is D. 90 adult tickets and 30 children's tickets
From the information given, an adult ticket for a magic show costs $18. A children's ticket for the magic show costs $12.
The number of adult tickets sold is 3 times the number of children's tickets sold. A total of $1980 is taken in for ticket sales.
Let the number of children tickets = x
Number of adults ticket = 3x
Therefore, this will be illustrated as:
18(3x) + 12(x) = 1980
54x + 12x = 1980
66x = 1980
Divide
x = 1980 / 66
x = 30.
Children ticket = 30
Adult tickets = 30 × 3 = 90
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