stne wrote:
Gangadhar111990 wrote:
Out of a stock of 10 microphones, an electronics store sold more than half of the microphones for $X and the remainder for $Y. If the average cost of the microphones to the store was $50 and the store's average profit on a pair of microphones was $20, what was the value of X?
(1) The store sold 20 microphones at $Y.
(2) Y=$60
(1) The store sold 20 microphones at $Y.
(2) Y=$60
If profit for\(2\) Mics is\(40\) then profit for\(10\) mics is\(200\)
Hence total sales revenue is\(700\)
(1) The store sold 2 microphones at$Y.
\( 8x+2y=700\)
Clearly insuff as\(x\) and\(y\) can have manyvalues.
(2) Y=$60
We do not know how many were sold for\($60\)
\( 8x +2*60 =700\)
\( 7x+ 3*60=700\)
etc.
We will get different values of\(x\)
INSUFF.
1+2
\( 8x+2*60=700\)
\(x=72.5 \)
SUFF.
Ans C
Hope ithelped.
Gangadhar111990 ,Bunuel There is a typo in statement 1. Thankyou.
Can't we solve I alone by x + y = 10 mics? Substitution of 2 variables with 2 equations.
...
Statistics : Posted by renzosm93 • on 20 Mar 2024, 08:25 • Replies 3 • Views 417
