#### Answer

$10$

#### Work Step by Step

$\left( x+y\right) ^{10}=x^{10}+10x^{9}y^{1}+\ldots +10xy^{9}+y^{10}$
As we see sum of exponents is always ten here

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$10$

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