1 votes 1 votes The ratio of ages of two persons $A$ and $B$ is $3:4$ and that of ages $B$ and $C$ is $4:5$. If the average of all three is $40$ years, what is $B$’s age? $20$ years $30$ years $40$ years $50$ years Unknown Category ugcnetcse-oct2020-paper1 + – go_editor asked Nov 20, 2020 edited Nov 21, 2020 by soujanyareddy13 go_editor 854 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
2 votes 2 votes $A:B:C$ is be $3:4:5$ and $A+B+C =40*3= 120$ $B’s$ age = $\frac{4}{12}*120 =40$ Option C) is correct Ashwani Kumar 2 answered Nov 21, 2020 Ashwani Kumar 2 comment Share Follow See all 0 reply Please log in or register to add a comment.