In a bag,there are coins of 25 p,10 p and 5 p in the ratio of 1 : 2 : 3.If there are Rs.30 in all,how many 5 p coins are there ? Choose the correct choice:
A) 50	B) 100	C) 150	D) 200	E) 250
Solution   Let the number of 25 p,10 p and 5 p coins be x,2x and 3x respectively.   Then,sum of their values = Rs.(250x/100 +10x2x100 +5x3x/100) = Rs.60x/100   ∴60/100 = 30 x =30x100/60 = 50.   Hence,the number of 5 p coins = (3x50) = 150   Answer 150
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In a bag,there are coins of 25 p,10 p and 5 p in the ratio of 1 : 2 : 3.If there are Rs.30 in all,how many 5 p coins are there ?