IBPS RRB Office Assistant 24 Sep 2017 Paper

(1) Let the original number of men in the group be x.
According to the question,
M1D1 = M2D2
⇒ x × 20 = (x – 12) × 32
⇒ 5x = (x – 12) 8
⇒ 5x = 8x – 96
⇒8x – 5x = 96
⇒3x = 96 ⇒ x =

96

3

= 32