The maximum number of electrons that can be present in an orbit with s=+1/2 and l = 2

 if the value of 'l' is 2 then it contains 5 orbitals and each orbital contain 2 electrons one is of 'm '​
 value is −1/2 and other have value +1/2 
So that there are 5 electrons are m  value +1/2 and l=2 .