Finding Middle Value ( Overlap Case): In these type of questions we are supposed to find the number of persons between to given persons. Overlap case is a situation when Total Number is less than the sum of the rank from both the end. Values required to find the mid number :
Formula to Find Mid Number (Overlap Case) : When Total Number is less than the addition of rank from both the end. Then such question is based on Mid Number (Overlap Case).
Mid No. (Overlap Case) = (Rank of one person from one end + Rank of another person from another end) - (Total Number + 2).
Illustration: In a row of 27 boys, X is 17th from left end and Y is 13th from right end. Find the number of boys are in between X and Y?
A. 1 B. 2 C. 3 D. 4 E. 5
Answer: A
Solution : - Given : Total Number = 27
Rank of X from left end = 17
Rank of Y from right end = 13
To find : How many boys are in between X and Y.
Formula is :
Mid No. = (Rank of X from left end + Rank of Y from right end) - (Total No. + 2)
Mid No. = (17 + 13) - (27 + 2)
30 - 29 = 1
Hence The correct Option is A
Along the road side 25 tree are planted in a row, The neem tree is 17th from left end and The mango tree is 13th from right end. Find the number of tree between neem tree and mango tree? | |||
Right Option : B | |||
View Explanation |
In a row of 25 boys, X is 20th from left end and Y is 14th from right end. Find the number of boys are in between X and Y ? | |||
Right Option : D | |||
View Explanation |
There are 22 students standing in a row, Ram is 14th from left end and Rohit is 14th from right end. Find the number of students are in between Ram and Rohit? | |||
Right Option : A | |||
View Explanation |
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