Answered

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2
in a school quiz contest rules were made to provide (+10) for each
correct answer and (-5) for each incorrect answer

(a)
if blue house scored 60 marks in which 2 questions were answered
correctly ?
(b)
if the yellow house obtained 20 marks In which 4 question were
answer incorrectly, how many questions were answered correctly
? Find out​

Sagot :

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