Abhinay Sharma Sir is the best faculty for mathematics . He has more than 5 lakh followers on his channel ABHINAY MATHS. He will be in rohtak on 12th may for open seminar.
Wow..he is very gud at advanced maths..and has very strong basic... His concept is very useful in today's unpredictable pattern of exam
In how many ways can the letter of the word RAINBOW be arranged so that only two vowel always remain together?