upper limit of 15 applicable to all co whether pvt or ltd. in case one third no is not in multiple of 3 than fraction should be considered 1 because sec 149(4) provided that listed co. shall have at least 1/3 dir. as ind dir.
provision says that at least 1/3 it means it may be one third or more but in any case should not be less than 1/3. so 10/3=3.33 i.e. 4 because if u rounded of as 3 than it does meet condition of at least onethird