please solve question no. 7th.
No Spamming.
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x = number of correctly answer questions
y = incorrectly
x+y = 120
x-0.5y = 90
_______________
1.5y = 30
y = 20
so
x = 100
answer is 100
y = incorrectly
x+y = 120
x-0.5y = 90
_______________
1.5y = 30
y = 20
so
x = 100
answer is 100
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