$$\frac { 3 } { 20 } + \frac { 7 } { 20 } + \frac { 9 } { 20 }$$
$\frac{19}{20}=0.95$
$$\frac{3+7}{20}+\frac{9}{20}$$
$$\frac{10}{20}+\frac{9}{20}$$
$$\frac{10+9}{20}$$
$$\frac{19}{20}$$
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$\frac{19}{2 ^ {2} \cdot 5} = 0.95$
