Represented

The children of 5A wrote a math test. The class had 29 children. After evaluation, there were two more units than cents, the mark 3 occurred three times, the mark 2 represented twice the number of units, the mark 4 did not occur. How many ones, twos, threes, fours, and threes were there on the test? What is the average grade for the class?

Correct answer:

a =  7
b =  14
c =  3
d =  0
e =  5
x =  2.3793

Step-by-step explanation:

$x=\frac{1\cdot a+2\cdot b+3\cdot c+4\cdot d+5\cdot e}{a+b+c+d+e}=\frac{1\cdot 7+2\cdot 14+3\cdot 3+4\cdot 0+5\cdot 5}{7+14+3+0+5}=\frac{69}{29}=2\frac{11}{29}=2.3793$

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