# Homework

In the crate are 18 plums, 27 apricot and 36 nuts. How many pieces of fruit left in the crate when Peter took 8 ninth:

1. nuts
2. apricots
3. fruit
4. drupe

Result

pcs of fruit:  45
pcs of fruit:  21
pcs of fruit:  5
pcs of fruit:  5

#### Solution:

$a = 18 + 27 = 45$
$b = 18 + 27 - \dfrac{ 8}{9}\cdot 27 = 21$
$c = 18 + 27 - \dfrac{ 8}{9}\cdot (18 + 27) = 5$
$d = 18 + 27 - \dfrac{ 8}{9}\cdot (18 + 27) = 5$

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