Question

in class of 50 students a student rank is 19th. when 2 girls and 3 boys joined the class his rank dropped by 3 what is new rank from bottom. (a) 21(b)32 (c) 29 (d)34​

Answer 1

Answer:

Usually, a rank is the position from the top.

If a person's rank is 20th among 100, it means, he is the 20th best person and 19 are better than him.

So, 19th rank means, the person is the 19th best among the 50 and 18 are better than him.

His rank is 50-19 =31. He is the 32nd from the last in terms of badness.

N+1-k

Where N is the total number of ranks

K is the rank from the top.

Hope its useful.