can anyone solve this problem
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1
Answer:
190
Including...
Hyderabad and Bengaloor
there are 20 stations
if we numbering 1 to 20 are the numbers of stations..
from 1 to 2,3,4,5,6,7,....,19,and20 all over second class tickets to be printed are...
19
similarly
18,
17,
...
...
2
from station No.19 to 20 there may print 1 type of ticket...
the total number of tickets to be printed=
19+18+17+16+........3+2+1
this is in the series of A.P
HENCE..
Sn= 19/2(19+1)
=19*10
=190
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