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skad [1K]
4 years ago
13

Can some one plz answer this question plz it's in the picture and who ever answers it first and correctly will get 50 points and

their question as the best

Mathematics
1 answer:
Cloud [144]4 years ago
7 0


 the answer is 78 kilometers.

1 cm=15 kilometers

so, 6 cm is equal to 90 kilometers.

0.8 millimetres is approximately 12 kilometers.

90 kilometers minus 78 kilometers is equal to 12.

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Natasha and Rodrigo are in a class of 30 students that selects 4 leaders. How many ways are there to select the 4 leaders so tha
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There are 20853 ways are there to select the 4 leaders so that either Natasha and Rodrigo are both selected or Natasha and Rodrigo are both not selected.

<h3>What is combination?</h3>

A combination is a mathematical technique that determines the number of possible arrangements in a collection of items.  

The number of the possible ways will be calculated by:

=2 ^{28}C_2+^{28}C_4

=\dfrac{28\times 27}{2}+\dfrac{28\times 27\times 26\times 25}{4\times 3\times 2}

=756+28853

=21231

Hence there are 20853 ways are there to select the 4 leaders so that either Natasha and Rodrigo are both selected or Natasha and Rodrigo are both not selected.

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