In a row of boys, Srinath is 7th from left and Prabin is 12th from right. If they interchange their positions, Srinath becomes 22nd from the left. How many boys are there in the row?
Question:
In a row of boys, Srinath is 7th from left and Prabin is 12th from right. If they interchange their positions, Srinath becomes 22nd from the left. How many boys are there in the row?
(A) 19
(B) 31
(C) 33
(D) 34
Solution:
Given,
Initial Positions:
Srinath is 7th from the left.
Prabin is 12th from the right.
After Interchanging:
Srinath becomes 22nd from the left.
Lets, determine the total number of boys:
Position of Prabin from the left = Total number of boys − Position of Prabin from the right + 1
⇒ 22 = N - 12 + 1
⇒ 22 = N - 11
⇒ N = 33
(N is the total no. of boys)
Answer: (C) 33
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