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

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Senior Manager
Joined: 02 Jan 2017
Posts: 293
Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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21 Feb 2017, 01:24
2
00:00

Difficulty:

25% (medium)

Question Stats:

69% (01:10) correct 31% (01:11) wrong based on 80 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.
Senior Manager
Joined: 19 Apr 2016
Posts: 268
Location: India
GMAT 1: 570 Q48 V22
GMAT 2: 640 Q49 V28
GPA: 3.5
WE: Web Development (Computer Software)
Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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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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Current Student
Joined: 28 May 2014
Posts: 515
GMAT 1: 730 Q49 V41
Re: Tara has 12 coins in her pocket. How many of them are quarters?  [#permalink]

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