CAT 2018 DILR Solution | Set - 2 | Satellites

CAT 2018 DILR Question | Satellites | CAT LRDI 2018:
Question:
1600 satellites were sent up by a country for several purposes. The purposes are classified as broadcasting (B), communication (C), surveillance (S), and others (O). A satellite can serve multiple purposes; however a satellite serving either B, or C, or S does not serve O.
The following facts are known about the satellites:
The numbers of satellites serving B, C, and S (though may be not exclusively) are in the ratio 2:1:1.
The number of satellites serving all three of B, C, and S is 100.
The number of satellites exclusively serving C is the same as the number of satellites exclusively serving S. This number is 30% of the number of satellites exclusively serving B.
The number of satellites serving O is the same as the number of satellites serving both C and S but not B.
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[shubhambhardwaj]

Sir your intensity impresses me a lot. I get a lot of positivity when i see your videos. Keep shining.

[arunganesh]

With a difficult scale of 1 to 8(8 being the maximum difficulty), where score would you give to this particular set among the other sets in this particular di lr slot

[aminaulfath]

sir, pls post video solutions for other sets also

[snehatangi]

sir as the ratio is 2:1:1, why can't we take B/C=2/1 || c/s=1/1 || B/S=2/1 and solve?? we get k value na sir?? i got first 2 answers by doing like this but last 2 answers are not coming

[ravikatariya]

Sir mere standard 10 me 70 percentage he aur standard 12 me 75 to Kya me cat ki exam de sakata huu

[surendraambati]

Is it better to leave this set in Exam or not?