Initial Positions Analysis
We are given the initial positions of Rakesh and Ankit in a line:
- Rakesh is 17th from the right end.
- Ankit is 15th from the left end.
Interchange Position Logic
The problem states that Rakesh and Ankit interchange their places. After the interchange, Ankit's new position is 19th from the left.
Since Ankit moved into Rakesh's original spot, this means Rakesh's original position was 19th from the left.
Calculating Total Students
Now we have two pieces of information about Rakesh's original position:
- Original position from the left: 19th
- Original position from the right: 17th
To find the total number of students in the line, we use the formula:
Total Students = (Position from Left) + (Position from Right) - 1
Substituting the values:
Total Students = $19 + 17 - 1$
Total Students = $36 - 1$
Total Students = 35
Important Questions from Ordering and Ranking (Notes)
- The sixth largest three-digit odd number among those with all digits distinct is
- A transformation experiment is performed with two Pneumococcal strains. One strain is resistant to four drugs - A, B, C, and D, whereas the other is sensitive to all the drugs. Both strains are mixed and the mixture is plated on media containing various combinations of the drugs. The colonies obtained on these plates are given below:
Drugs added No. of colonies Drugs added No. of colonies A 1156 CD 786 B 1148 ABC 30 C 1161 ABD 42 D 1139 ACD 630 AB 46 BCD 36 AC 640 ABCD 30 AD 942 BC 51
Based on the above results, which one of the below options represents the most likely order of the drug-resistance genes? - There are five boys P, Q, R, S and T sitting in a row facing North such that P is right of Q and T is left of R and right of P. Q is right of S. Which boy is in the middle of the row?
- Five students P, Q, R, S and T scored different marks in an examination. Q scored more marks than at least two students. T scored less marks than S but more than R. S scored less marks than P. Q did not score the highest marks.
Which of the following statements is/are correct ?
Statements :
I. Q holds second position.
II. Q holds third position.
III. Q holds fourth position. Each of P, Q, R, S, T, U and V has an exam on a different day of a week, starting from Monday and ending on Sunday of the same week. U has an exam on Friday. Only 2 people have exams between U and R. V has an exam immediately before Q and T has an exam immediately after S. Only 2 people have exams between P and Q. Who has an exam on Sunday?
