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Question 29 (A) On a particular day, 50000 people attended a Cricket Test Match between India and Australia in Sydney Cricket Ground. Let x be the number of adults attended the cricket match and y be the number of children attended the cricket match. Cost of an adult ticket was ₹1000 while cost of a child ticket was ₹200. On that day Revenue earned by selling all 50,000 tickets, was ₹4,20,00,000. Find how many adults and how many children attended the cricket match?Given Number of adults attending cricket match = x Number of children attending cricket match = y Now, Total 50,000 people attended the match. So, we can write Number of adults + Number of children = 50,000 x + y = 50,000 Also, Cost of an adult ticket was ₹1000 while cost of a child ticket was ₹200. And, total revenue ₹4,20,00,000 Now, Revenue earned by selling 1 adult ticket = ₹ 1,000 Revenue earned by selling x adult tickets = ₹ 1,000 × x And, Revenue earned by selling 1 child ticket = ₹ 200 Revenue earned by selling y child tickets = ₹ 200 × y Also, total revenue ₹4,20,00,000. So, we can write Revenue from adults + Revenue from children = ₹4,20,00,000 ₹ 1,000 × x + ₹ 200 × y = ₹4,20,00,000 1000x + 200y = 4,20,00,000 Dividing by 200 both sides 1,000𝑥/200+200𝑦/200=4,20,00,000/200 5x + y = 2,10,000 Now, our equations are x + y = 50,000 …(1) 5x + y = 2,10,000 …(2) Doing (2) – (1) (5x + y) – (x + y) = 2,10,000 – 50,000 5x – x + y – y = 1,60,000 4x = 1,60,000 x = 1,60,000/4 x = 40,000 Putting value of x in (1) x + y = 50,000 40,000 + y = 50,000 y = 50,000 – 40,000 y = 10,000 Therefore, Number of adults attended the match is 40,000 and number of children attended is 10,000

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 15 years. He provides courses for Maths, Science and Computer Science at Teachoo