The probabilities of three mutually exclusive events are 2/3, 1/4, and 1/6. Is this statement correct?

The probabilities of three mutually exclusive events A, B and C are given by 2/3,1/4 and 1/6 respectively. The statement. a. is true b. is false c. nothing can be said d. could be either

If A and B are mutually exclusive events, then

If (1+4p)/4,(1-p)/2and(1-2p)/2 are the probabilities of three mutually exclusive events, then value of p is

If (1+4p)/(4),(1-p)/(3) and (1-2p)/(2) are the probabilities of three mutually exclusive events then values of p may be

If (1+3p)/(4),(1-p)/(3),(1-3p)/(2) are the probabilities of three mutually exclusive events, then the set of all values of p is