Numerical: ranking and position MCQ - Practice Questions with Answers

For a person whose position is known from both ends of a row, the total number is left position plus right position minus 1. John is counted once in the count from the left and once again in the count from the right, so one duplicate count must be removed. The calculation is 32 + 15 - 1 = 46. Therefore 46 fits both given positions. The numbers 45, 47 and 48 would make John's position from one end inconsistent with the other.

After the interchange, Kavita occupies Babita's original position. Since Kavita then becomes 15th from the left, Babita's original position was 15th from the left. Babita was also 9th from the right. Total persons in a row are found by adding left position and right position of the same person, then subtracting 1 because that person is counted twice: 15 + 9 - 1 = 23. The counts 21, 25 and 27 do not satisfy both Babita's original left and right positions together.