Verified Answer :

so if 60 marks is 40%do buildind blocks 40%+ 40 % 80% = 120 marks so ad 20 % which is 30 marks so full marks is 150

dalendrk

Method 1:

\(\begin{array}{ccc}60&-&40\%\\x&-&100\%\end{array}\ \ \ \ |cross\ multiply\\\\40x=60\cdot100\\40x=6000\ \ \ \ |divide\ both\ sides\ by\ 40\\x=150\)

Answer: Full marks is 150.


Method 2

\(\begin{array}{cccc}60&-&40\%&|divide\ both\ sides\ by\ 4\\15&-&10\%&|multiply\ both\ sides\ by\ 10\\150&-&100\%\end{array}\)

Answer: Full marks is 150.

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