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26 Mar 2019, 23:00
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (02:02) correct
22%
(02:09)
wrong
based on 49
sessions
History
Date
Time
Result
Not Attempted Yet
On a test, 12 contests will be scored by awarding 6 points for each correct response, 0 points for each incorrect response, and 1.5 points for each problem left unanswered. After looking over the 25 problems, Sarah has decided to attempt the first 22 and leave the last 3 unanswered. How many of the first 22 problems must she solve correctly in order to score at least 100 points?
(A) 13
(B) 14
(C) 15
(D) 16
(E) 17
(A) 13
(B) 14
(C) 15
(D) 16
(E) 17
26 Mar 2019, 23:21
Kudos
Bookmarks
Let x be problems solved correctly
6x+1.5×3>=100
Solving for x we get x=16
Posted from my mobile device
6x+1.5×3>=100
Solving for x we get x=16
Posted from my mobile device
Archit3110
Major Poster
27 Mar 2019, 01:02
Kudos
Bookmarks
Bunuel
he gets 1.5*3 = 4.5 marks; left 100-4.5; 95.5
question to score >=100 ; 95.5/6 ; ~ 16
IMO D
