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Question
In a row of boys, if P who is tenth from the left and Q who is ninth from the right interchange their positions, P becomes fifteenth from the left . How many boys are their in the row?
In a row of boys, if P who is tenth from the left and Q who is ninth from the right interchange their positions, P becomes fifteenth from the left . How many boys are their in the row?
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Solution
The correct option is A 23
Total number of boys=(P's position from right +P's position from left)-1
⇒(9+15)−1=23
Total number of boys=(P's position from right +P's position from left)-1
⇒(9+15)−1=23
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