In a cinema hall, 500 tickets were sold. The total sale was RS 12000. The ticket we're of denomination of RS 15 and RS 30. How many of each denomation were sold.
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let the no. of tickets of 15 rupees=x
then the no. of tickets of 30 rupees=500-x
given 15x+30(500-x)=12000
15x+15000-30x=12000
15x=3000
x=200
15 rupees tickets=200
30 rupees tickets=300
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