if letters of the word MATHEMATICS are arranged then the probability that C come before E,E before H ,H before I and I before S

If all the letters of the word IIT-JEE are written at random in a row, then the probability that both I's come before T, is (a)1/5 (b) 1/(30) (c) 1/(10) (d) 1/3

If all the letters of the word IIT-JEE are written at random in a row, then the probability that both Is come before T, is 1/(15) b. 1/(30) c. 1/(10) d. 1/3

On her vacations Veena visits four cities A, B, C and D in a random order. What is the probability that she visits: a. A before B? b. A before B and B before C? c. A first and B last? d. A either first or second? e. A just before B?

On her vacations Veena visits four cities (A,B,C and D) in a random order.What is the probability that she visits (i) A before B? (ii) A beore B and B before C? (iii) A first and B last? (iv) A either first or second? (v) A just before B?

I don't think I meet him before

By using all the letters of the word AAIPEEAL' words are formed.If N denotes number of such words in which no E comes before A and do not contain the word 'IPL' then ((N)/(5)) is equal to

By using all the letters of the word 'AAIPEEAL' words are formed If N denotes the number of such words in which no E comes before A and do not contain the word IPL ,then (N)/(55) is