#### Answer

$0.3439$

#### Work Step by Step

Complement of P(A) is that at least of the digits is seven. The four times we select, we can choose any 9 options out of the 10, therefore: $P(\overline{A})=1-P(A)=1-(\frac{9}{10})^{4}=0.3439$

Published by
Pearson

ISBN 10:
0321836960

ISBN 13:
978-0-32183-696-0

$0.3439$

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