ICSE Class 7 Answered
Q7, 3rd. Part
Asked by manuyadav.sis | 09 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 | 10 Aug, 2019, 04:01: PM
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