The number of minimum coins used to make 100 cents is 2 coins of 50 cents each.
The number of maximum coins used to make 100 cents is 100 coins of 1 cent each.
So, the number of coins could be any number from 2-100.
You can think of this:100 coins of 1 cent are required to make 100 cents.
5 coins of 1 cent each can be replaced with 1 coin of 5 cents so the total possible coins could be 96(100-4),92(100-4-4) , and so on.
Similarly,10 coins of 1 cent each can be replaced with 1 coin of 10 cents, hence the number of possible coins could be91(100-9),82(100-9-9) , and so on.So, 91 is a possibleoption.
Similarly,25 coins of 1 cent each can be replaced with 1 coin of 25 cents, hence the number of possible coins could be76(100-24),52(100-48) , and so on.So, 76 is a possibleoption.
There is no combination of 81 coins that could make 100 cents.
Hence, the correct answer is D.
...
The number of maximum coins used to make 100 cents is 100 coins of 1 cent each.
So, the number of coins could be any number from 2-100.
You can think of this:100 coins of 1 cent are required to make 100 cents.
5 coins of 1 cent each can be replaced with 1 coin of 5 cents so the total possible coins could be 96(100-4),92(100-4-4) , and so on.
Similarly,10 coins of 1 cent each can be replaced with 1 coin of 10 cents, hence the number of possible coins could be91(100-9),82(100-9-9) , and so on.So, 91 is a possibleoption.
Similarly,25 coins of 1 cent each can be replaced with 1 coin of 25 cents, hence the number of possible coins could be76(100-24),52(100-48) , and so on.So, 76 is a possibleoption.
There is no combination of 81 coins that could make 100 cents.
Hence, the correct answer is D.
...
Statistics : Posted by PANK29GMATRAINER • on 27 Apr 2020, 14:43 • Replies 18 • Views 16410
