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bablu nath

· started a discussion

· 1 Months ago

how -1 came? (Question: 186175.0 )

18+10=28

Question:
In a row, P is at the 11th position from left and Q is 10th from right. If they interchanged their positions, P becomes 18th from left. How many persons are there in that row ?
Options:
A) 28
B) 29
C) 27
D) 31
Solution:
Ans: (c) 


Total no. of persons = 18 + 10 – 1 = 27

VIJAY SINGH

· commented

· 1 Months ago

you r counting twice the position , its 18+10-1=27
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