There are 5 speakers A, B, C, D and E. The number of ways in which A will speak always before B is:

A,B,C are three persons amongst seven persons who speak at a function . The number of ways in which it can be done if A speaks before B and B speaks before C is

IF eight person are to address a meeting , then the number of ways in which a specified speaker is to speak before another specified speaker is

A,B ,C are three persons among 7 persons who speak at a function.The number of ways in which it can be done if A speaks before B and B speaks before C is

Four speakers will address a meeting where speaker Q will always speak after speaker p .Then the number of ways in whcich the prder of speakers can be prepared is -

A meeting is to be addressed by 5 speakers A, B, C, D, E. In how many ways can the speakers be ordered, if B must not precede A (immediately or otherwise)?

If eight persons are to address a meeting, then the number of ways in which a specified speaker is to speak before another specified speaker, is

If eight persons are to address a meeting, then the number of ways in which a specified speaker is to speak before another specified speaker, is