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08 Jan 2018, 23:34
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (01:35) correct
35%
(01:38)
wrong
based on 119
sessions
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Not Attempted Yet
What is the ratio of nickels to dimes in a bag of change that contains only nickels and dimes? (nickel = $0.05; dime = $0.1)
(1) The total amount of money in the bag is $8.70.
(2) If the number of nickels was increased by 10%, the number of nickels in the bag would be 50% of the total number of dimes in the bag.
(1) The total amount of money in the bag is $8.70.
(2) If the number of nickels was increased by 10%, the number of nickels in the bag would be 50% of the total number of dimes in the bag.
Updated on: 12 Jun 2019, 14:06
Originally posted by DavidTutorexamPAL on 09 Jan 2018, 04:28.
Last edited by DavidTutorexamPAL on 12 Jun 2019, 14:06, edited 2 times in total.
Last edited by DavidTutorexamPAL on 12 Jun 2019, 14:06, edited 2 times in total.
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Bunuel
We'll use easy numbers to eliminate contradictory answers.
This is an Alternative approach.
(1) Say there was only 1 dime. Then there would be $8.6 worth of nickels. Say there were 2 dimes. Then there would be $8.5 of nickels.
As these are different, (1) is insufficient.
(2) Say we had 10 nickels. Then this was increased to 11 and we would have 22 dimes in the bag.
This is enough to calculate the ratio!
If we try different numbers of nickles, we can SEE that we will always have 2*(n+ n*10%) = 2.2n dimes in the bag
Sufficient!
(B) is our answer.
rahul12988
12 Jun 2019, 06:19
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question asks for ratio of n/d
A) n* 0.05 + d* 0.1 = 8.70
we can't get n/d
B) n2= increased no of nickel
n2= 1.1n
n2= 50%of (d)
n2= d/2 but n2 = 1.1 n
so we can get n/d So B is sufficient
A) n* 0.05 + d* 0.1 = 8.70
we can't get n/d
B) n2= increased no of nickel
n2= 1.1n
n2= 50%of (d)
n2= d/2 but n2 = 1.1 n
so we can get n/d So B is sufficient
