SAT Math Practice Question #25183 - SATify | SATify

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SAT Math Practice Question #25183 - SATify | SATify

#25183

algebra

sequences and series

medium

120 sec

The average of the numbers $1, 2, 3, \dots, 19,$ and $x$ is $20 x$ . What is $x$ ?

A.

$\frac{9}{21}$

B.

$\frac{10}{21}$

C.

$\frac{1}{2}$

D.

$\frac{11}{21}$

E.

$\frac{10}{19}$