In a row of forty children, K is thirteenth from the left end and B is ninth from the right end. How many children are there between K and M if M is fourth to the left of B?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 14
All positions are first counted from the same end (the left), because a place counted from the right end is the (total + 1 − that place) from the left.
K is 13th from the left
B is 9th from the right, that is, \(40+1-9=32\)nd from the left
M is fourth to the left of B: \(32-4=28\)th from the left
Children between K (13th) and M (28th): \(28-13-1=14\)
