Question

71. Soham bought 30 tickets in all,
of which, some cost 15 and the rest cost rs 20. If
the total cost of the tickets was
rs540, how many tickets of rs 20 were bought ?​

Answer 1

Answer:

18

Step-by-step explanation:

Let us assume he bought X tickets of rs 20.

Then no. of tickets bought for rs 15 is (30-X)

Total cost of tickets of rs 20= 20x

Total cost of tickets of rs 15= 15(30-x)

20x + 15(30-x)= 540

20x + 450 - 15x = 540

5x= 90

x=18

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