Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Eduncle Best Answer
A lies on Monday, Tuesday and Wednesday
B lies on Thursday, Friday and Saturday
Both A and B Thursday, Friday and Saturday
Both A and B will tell truth only on Sunday
Statement is given that if both A and B state that they have lied yesterday
The only possibility is that either of A or B is speaking truth or lie
Consider if A is speaking truth and B is telling lie
Then only possibility if both state that they have lied yesterday is Thursday
So option (2) is correct.