From statement A, we see that Amount of work done by Amit in 1 day = 1/8 Amount of work done by Babu in 1 day = 1/12 Hence, Amount of work done by both working together in 1 day = 1/8 + 1/12 = 5/24 Hence, number of days required = 24/5 = 4.8 days From statement B, We have Amit’s efficiency : Babu’s efficiency = 3 : 2 If amit takes 3x days, then Babu takes 2x days to complete the work alone. Total amount of work done by Amit and Babu in 1 day = (1/3x) + (1/2x) = 5/6x Hence number of days required = 6x/5 = 1.2x But x is unknown. Hence, no inference can be drawn from statement B. Hence Statement A is alone sufficient to answer the question