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Tara has 12 coins in her pocket. How many of them are quarters?

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Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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New post 21 Feb 2017, 01:24
2
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

68% (01:11) correct 32% (01:09) wrong based on 73 sessions

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Tara has 12 coins in her pocket. How many of them are quarters?

(1) The total value of the 12 coins is $1.80.
(2) Tara has only quarters and dimes.
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Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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New post 21 Feb 2017, 01:53
1
[you-tube][/you-tube]
vikasp99 wrote:
Tara has 12 coins in her pocket. How many of them are quarters?

(1) The total value of the 12 coins is $1.80.
(2) Tara has only quarters and dimes.


St I
The total value of the 12 coins is $1.80
No info about the types of coins present --------Insufficient

St II
Tara has only quarters and dimes.
Total Value is not given ----------Insufficient

Combining St I and II, we have
Q + D = 12 and 0.25*Q + 0.10*D = 1.80 ----------Sufficient

Hence Option C is correct
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Re: Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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New post 21 Feb 2017, 03:18
(1) Total number of coins and values are available. But no information about the dimensions. Hence, Insufficient.
(2) Only dimensions area available. No idea about the total amount and number of coins. Hence, Insufficient.

(1) & (2) together,
Q + D = 12
0.25*Q + 0.10*D = 1.80; Hence, Sufficient.
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Re: Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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New post 01 Apr 2018, 04:43
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Tara has 12 coins in her pocket. How many of them are quarters? &nbs [#permalink] 01 Apr 2018, 04:43
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