1003019102
Level:
A
An urn contains \( 19 \) red balls and \( 9 \) blue balls. Find the least number of blue balls that need to be added to the urn to ensure higher probability of drawing a blue ball than \( 0.65 \).
\( 27 \)
\( 26 \)
\( 10 \)
\( 0 \)