Q. 77 If s is a string over (0 + 1)* then let n(s) denote the number of 0’s in s and n1(s) the number of 1’s in s. Which one of the following languages is not regular? 
Answer: (C)
Explanation: 
Q. 77 If s is a string over (0 + 1)* then let n(s) denote the number of 0’s in s and n1(s) the number of 1’s in s. Which one of the following languages is not regular? Answer: (C)
Explanation:
