Comprehension Passage

Directions: Study the following information carefully and answer based on it.

Qatar airlines offer only 2 Aircrafts namely B767 and A320 for all of its passengers. Number of passengers who travelled from A320 in 2018 was 40% less than that in 2020. Number of passengers who travelled from B767 in 2018 was 25% of number of people who travelled from B767 during 3 years (2018, 2019 and 2020). Ratio of number of passengers who travelled from B767 in 2019 and 2020 is 4:5 respectively. Number of passengers who travelled from A320 in 2019 was 50% more than the number of passengers who travelled from B767 in 2018. Total number of passengers who travelled from A320 during 3 years (2018, 2019 and 2020) was 5800. In 2019 number of passengers who travelled from A320 was 200 more than that from B767.

If number of passengers who travelled from A320 in 2019 are 4a and number of passengers who travelled from B767 in the same year are b, then find the value of (3a - 50 + b1/2).

1
1340
2
2270
3
1270
4
1190
5
1450

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