Six persons A, B, C, D, E, F, are to be seated at a circular table. In how many ways antis be one if A should have either B or C on his right and B must always have either C or D on his right.

An ordinary cubical dice having six faces marked with alphabets A, B, C, D, E, and F is thrown n times and the list of n alphabets showing up are noted. Find the total number of ways in which among the alphabets A, B, C D, E and F only three of them appear in the list.

If A={a,b,c,d}. How many subsets does the set A have? (A) 5 (B) 6 (C) 16 (D) 65

There are five boys A, B, C, D and E. The order of their height is A lt B lt C lt D lt E . Number of ways in which they have to be arranged in four seats in increasing order of their height such that C and E are never adjacent.

A person always prefers to eat parantha and vegetable dish in his meal. How many ways can he makes his platter in a marriage party if there are three types of paranthas, four types of vegetable dish, three types of salads and two types of sauces? a. 3360 b. 4096 c. 3000 d. none of these

If a ,b ,c ,d ,e ,f are A.M.s between 2 and 12, then find the sum a+b+c+d+e+fdot

The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is

Four non zero vectors will always be a. linearly dependent b. linearly independent c. either a or b d. none of these

If a,b,c are in H.P , b,c,d are in G.P and c,d,e are in A.P. , then the value of e is

An individual may have births and deaths but a population has (a ) and (b ) An individual is either a male or a female but a population has a (c ) .