Assuming you mean 70%, and also that all questions have the same value, start by calculating 70% of 130. This will give you the number of RIGHT answers you need. Round this up.
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To get a 70 to pass the test you can miss 37 questions.
You can miss 31.5 questions. 105*70%(.70)=73.5 105-73.5= 31.5
Around 99 questions to get a straight 70.
3 out of 10
50