Q 2370780616.     Read the following caselet and answer the questions.

There are some people who travel by three different airlines. 1050 people travel only by Kingfisher. Number of the people who travel only by indigo is 2/3rd of the people who travel only by Kingfisher. Number of people who travel by Vistara and not Kingfisher is thrice the number of people who travel only by Indigo. Number of people who travel only by Vistara is 5/2 of the number of people who travel both by Vistara and Indigo but not Kingfisher. Number of people who travel by all the three flights is half the number of people who travel both by Indigo and Vistara and not Kingfisher. The number of people who travel either by Kingfisher and Vistara or by Kingfisher and Indigo is 1400. The ratio of number of people who travel by Kingfisher and Vistara but not by Indigo to the number of people who travel by Kingfisher and Indigo but not by Vistara is 3:2.
How many people travel by both Kingfisher and Vistara?