What is the value of (a! + b!) (c! + d!)?
(1) b!d! = 4(a!d!).
(2) 60(b!c!) = b!d!.
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(a! + b!) (c! + d!)?
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sanju09
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Sanjeev K Saxena
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The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
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sparkles3144
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What is the value of (a! + b!) (c! + d!)?
(1) b!d! = 4(a!d!).
(2) 60(b!c!) = b!d!.
(1) b!d! = 4(a!d!)
b! = 4(a!)
b!/a! = 4
4! / 3! = 4
So, b =4 and a = 3
We do not the value of c and d. Therefore not sufficient.
(2)60(b!c!) = b!d!
60(c!) = d!
d!/c!= 60
d = 60 and c = 59
We do not the value of a and b. Therefore not sufficient.
(c) combine (1) and (2)
We have all four values. It is sufficient.
Answer C
(1) b!d! = 4(a!d!).
(2) 60(b!c!) = b!d!.
(1) b!d! = 4(a!d!)
b! = 4(a!)
b!/a! = 4
4! / 3! = 4
So, b =4 and a = 3
We do not the value of c and d. Therefore not sufficient.
(2)60(b!c!) = b!d!
60(c!) = d!
d!/c!= 60
d = 60 and c = 59
We do not the value of a and b. Therefore not sufficient.
(c) combine (1) and (2)
We have all four values. It is sufficient.
Answer C
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sanju09
- GMAT Instructor
- Posts: 3650
- Joined: Wed Jan 21, 2009 4:27 am
- Location: India
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- Followed by:80 members
- GMAT Score:760
In statement (2), 60 (c!) = (d!) can also be interpreted as (5)(4)(3)(c!) = (d!), which may mean that c = 2 and d = 5.sparkles3144 wrote:What is the value of (a! + b!) (c! + d!)?
(1) b!d! = 4(a!d!).
(2) 60(b!c!) = b!d!.
(1) b!d! = 4(a!d!)
b! = 4(a!)
b!/a! = 4
4! / 3! = 4
So, b =4 and a = 3
We do not the value of c and d. Therefore not sufficient.
(2)60(b!c!) = b!d!
60(c!) = d!
d!/c!= 60
d = 60 and c = 59
We do not the value of a and b. Therefore not sufficient.
(c) combine (1) and (2)
We have all four values. It is sufficient.
Answer C
The mind is everything. What you think you become. -Lord Buddha
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001
www.manyagroup.com
