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 one.
A) 165  B) 716  C) 150  D) 143  E) 145
Let the number of 25 p, 10 p and 5 p coins be x, 2x and 3x respectively.   Then, sum of their values = [25x/100 + (10 * 2x)/100 + (5 * 3x)/100] = Rs. 60x/100   60x/100 = 30 =&gt; x = 50.   Hence, the number of 5 p coins = 3 * 50= 
<gadget id="calculator">3 * 50</gadget>
<output>150</output>
150.   Answer:150
<result>C</result>
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?