Question : is p $ q less than 20?anurag_7 wrote:If $ defines a certain operation, is p $ q less than 20?
(1) x $ y = 2x² - y for all values of x and y
(2) p = 4, q = 10
[We need to know the meaning op operation $ to answer the question]
Statement 1) x $ y = 2x² - y for all values of x and y
Therefore p $ q = 2p² - q
But since the values of p and q are unknown therefore INSUFFICIENT
Statement 2) p = 4, q = 10
But the meaning of operator $ is unknown therefore INSUFFICIENT
Combining the two statements
[ p $ q = 2p² - q ] and [ p = 4, q = 10 ]
p $ q = 2*4^2 - 10 = 32 - 10 = 22 Which is greater than 20, Answering the question as NO therefore,
SUFFICIENT
Answer: Option C
