#### Answer

$\frac{1}{10}$

#### Work Step by Step

The table shows 9 with the B+ blood type and 1 with the B- blood type, so 10 ($9+1$) have type AB. The whole set of blood donors contained 100.
$\frac{10}{100}=\frac{10\div10}{100\div10}=\frac{1}{10}$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$\frac{1}{10}$

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