IBPS Clerk Prelims 2015 Paper

(b) Given that two boys can do the work in ten days,three girls can do it in five days
⇒One boy can do the work in 2 × 10 = 20 days
One girl can do the work in 3 × 5 = 15 days
∴ Number of days taken by a boy and a girl workingtogether to finish the work
=

1

1 15 + 1 20

=

60

40+3

=

60

7

=8

4

7

days