Average mark

Calculate average mark in English, if a student got a couple of 3's, 20% less 2 than 3, and 50% more 1's than the 2's.

Correct result:

p =  1.9333

Solution:

p=3x+20.8x+11.50.8xx+0.8x+1.50.8x=31+20.8+11.50.81+0.8+1.50.8=1.9333



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