Question

To score 90+% in subject each of 80 marks, then how much we need to score in every subject ( there are 7 subject )

Answer 1

72 marks is the answer.

Answer 2

$since \: there \: are \: seven \: subjects \: of \: eighty \: marks \: the \: total \: marks \: are = 7 \times 80 \\ = 560marks \\ 90\% \: score = \frac{90}{100} \times 560 \\ = 9 \times 56 \\ = 494 \\ therefore \: to \: score \: at \: least \: 90\% \: we \: need \: to \: score \: a \: least \: total \: of \: 494 \: marks \: that \: means \: a \: least \: of \: \frac{494}{7} \\ = 70.57marks \\ so \: at \: least \: 70.57 \: marks \: are \: needed \: in \: each \: subject$