We have to determine whether the product of 3p and 4 is greater than 20.
Let us consider 1)
It tells us that 5p>7.
Multiple both sides by 12/5. This would give us 12p>16.8. However, we cannot be sure of whether 12p>20 or not. It could equal to 21 or equal to 17 for all we know. Hence,INSUFFICIENT.
Let us consider statement 2).
It tells us that 3p-5>1
This implies that 3p>6. Therefore, 12p>24. Hence, we know for sure that 12p has to be greater than 20. Hence, SUFFICIENT.
Hope this helps! Let me know in case of any further questions.
Is the product of 3p and 4 greater than 20?
(1) 5p > 7
(2) 3p − 5 > 1
Instructor at Aspire4GMAT
Visit us at http://www.aspire4gmat.com
Post your queries
Join our free GMAT course
New blog: How to get that 700+
New blog: Data Sufficiency Tricks
Press Kudos if this helps!