Orientation|JEE Umeed 2.0 Batch

N Characters of information are held on magnetic tape,in batches of x characters each,the batch processing time is alpha+beta x^(2) seconds,alpha and beta are constants.The optical value of x for fast processing is

In a batch of 10 articles.4 articles are defective.6 articles are taken from the batch for inspection.If more than 2 articles in this batch are defective,the whole batch is rejected.Find the probability the batch will be rejected.

The number of students at 4 IIM in morning batch, evening batch and weekends batch is 30, 40 and 60 respectively and their respective average ages (in years) are 22, 21 and 25 then the average age of all the students (combined) is :

A coaching institute for IIT has 4 batches. Number of boys and girls in each batch is given below 1) In how many ways a prize can be given to one student of batch A