(I). Kamal is available at home from 12 noon to 4 p.m. on Tuesday, Thursday and Sunday.
(II). His younger brother Navin is available at home on Monday, Thursday, Friday and Sunday between 10 a.m. to 2 p.m.
(III). The eldest brother Rajiv is available between 9 a.m. to 12 noon on Monday, Wednesday and Thursday and 2 p.m. to 4 p.m. on Friday, Saturday and Sunday.
At a time, on which day of a week all the three brothers are available at home ?
Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
9 a.m. to 10 a.m. | R | R | R | ||||
10 a.m. to 12 noon | N, R | R | N, R | N | N | ||
12 noon to 2 p.m. | N | K | K, N | N | K, N | ||
2 p.m. to 4 p.m. | K | K | R | R | K, R |