Question 127
A person buys 18 local tickets for Rs. 110. Each first class ticket costs Rs. 10 and each second class ticket costs Rs. 3. What will another lot of 18 tickets in which the number of first class and second class tickets are interchanged cost?
Solution
Consider the number of first-class tickets =a and the second-class ticket =b
10a+3b=110
a+b=18
Solving two equations, we get a=8, b=10
After interchanging the number of tickets, the new cost = 10*10+3*8 =124
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