A bag contains a certain number of 50 paise coins, 20 paise coins and 10 paise coins inthe ratio 3:4:5. If the total value of all the coins in the bag is Rs.420, find the number of 50 paise coins ?
Choose the correct choice from the following:
A) 498
B) 488
C) 450
D) 528
E) 418
50*3k + 20*4k + 10*5k = 42000   280k = 42000 =&gt; k = 150   50p coins = 3k = 3*150= 
<gadget id="calculator">3*150</gadget>
<output>450</output>
450   ANSWER:450
<result>C</result>
A bag contains a certain number of 50 paise coins, 20 paise coins and 10 paise coins inthe ratio 3:4:5. If the total value of all the coins in the bag is Rs.420, find the number of 50 paise coins ?