© NCERT
not to be republished
PROBABILITY      555
Example 21 A man is known to speak truth 3 out of 4 times He throws a die and
reports that it is a six Find the probability that it is actually a six Solution Let E be the event that the man reports that six occurs in the throwing of the
die and let S1 be the event that six occurs and S2 be the event that six does not occur