The positions of Suman and Rajesh in a row are $$12^{th}$$ from left and $$8^{th}$$ from right respectively. If they interchange their places, then Rajesh will be $$17^{th}$$ from right. Find out the position of Suman from left and the total number of persons in the group?
Let us consider the position of suman to be denoted by x
In the first case, x is 12th from left.
After interchanging, x is 17th from right.
So position of x is 12+17-1 .i.e. 28
we are deducting 1 because x position is considered twice.
Hence Option B is correct.
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