A certain number of persons are sitting in the row. All of them are facing towards North. S is tenth from the left end of the row. W is fourth from one of the ends. V sits sixth to the left of W. Only two persons sit between S and V. How many number of persons could sit in the row?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 22
All the persons face North, so their left is the left end of the row. Count every place from the left end:
S is 10th from the left.
Only two persons sit between S and V, so V is 3 places away from S: 7th or 13th.
V is sixth to the left of W, so W is 6 places to the right of V: 13th or 19th.
W is fourth from one end. Being 13th or 19th from the left, W cannot be 4th from the left end, so W is 4th from the right end, with 3 persons to its right:
W 19th: \(19+3=22\) persons
W 13th: \(13+3=16\) persons
The row can have 16 or 22 persons; only 22 is among the options.
