Average mark

Calculate the average grade in English if a student received 2 grade 3 s, 20% fewer grade 2 s than grade 3 s, and 50% more grade 1 s than grade 2 s.

Final Answer:

p =  1.9333

Step-by-step explanation:

$$\begin{gathered} p=\frac{3\cdot x+2\cdot 0.8x+1\cdot 1.5\cdot 0.8x}{x+0.8x+1.5\cdot 0.8x} \\ p=\frac{3\cdot 1+2\cdot 0.8+1\cdot 1.5\cdot 0.8}{1+0.8+1.5\cdot 0.8}=1.9333 \end{gathered}$$

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