In an examination, 5 children were found to have their

Last updated: 7/20/2022

In an examination, 5 children were found to have their mobiles in their pocket. The invigilator fired them and took their mobiles in his possession towards the end of the test, Invigilator randomly returned their mobiles. The number of ways in which atmost two children did not get their own mobiles is 11 λ then λ =