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Lesson 1 of 7 · Single row, facing one direction

Left right count

Linear Arrangement · for IPMAT Indore, IPMAT Rohtak and JIPMAT

Worked examples

Example 2Sitter

In a row of 8, A is 4th from the left. What is A's position from the right?

Example 3Easy

Nine friends: K at an end, O third to the left of K, J immediately left of O, Q next to both O and P. Which seats do J, O, Q, P, K take?

Formulas you need

Position from the right=n−(position from the left)+1\text{Position from the right} = n - (\text{position from the left}) + 1

Facing north: right=our right; k-th to the right of seat i=seat i+k\text{Facing north: right} = \text{our right}; \ k\text{-th to the right of seat } i = \text{seat } i + k

Watch out

  • Between count: persons between seats 2 and 5 are 2, not 3.

Picked from the Single row, facing one direction note for this micro-concept automatically. The whole note: Single row, facing one direction.