Q7, 3rd. Part

Asked by manuyadav.sis | 9th Aug, 2019, 06:39: PM

Expert Answer:

now +3 for correct and -2 for wrong answers
16 questions attempted
let
a be the number of right ones
so wrong ones = 16 - a
 
total mark scored=18
so,
18 = (3)a + (-2)(16-a)
18 = 3a - 32 + 2a
50 = 5a
a = 10
right ans = 10
wrong ans = 6

Answered by Arun | 10th Aug, 2019, 04:01: PM