CAT 2015 Quantitative Ability

Let the number of Re. 1, 50 paise and 25 paise coins be 360,432 and 576 respectively (ratio 5:6:8).

Re.1	50 paise	25 paise
360	432	576

I transaction: 3/5th of Re. 1 coins changed 216 coins of Re. 1 would be changed with 144 coins of 50 paise and 576 coins of 25 paise (so that total 50 paise coins = 576 and total 25 paise coins = 1152 in the ratio 1:2)

Re.1	50 paise	25 paise
144	576	1152

II transaction: Half of 50 paise coins to Re. 1 and all 25 paise coins to Re. 1 and 50 paise in the ratio 7:4.
Half of 50 paise coins ⇒ 144 coins of Re. 1
1152 coins of 25 paise ⇒ 224 coins of Re. 1 and 128 coins of 50 paise

Re.1	50 paise	25 paise
512	416	0

Ratio = 512 : 416 = 16 : 13