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Lingling loses weight 140 to 95.
The ratio of red ball to blue ball is13: 50% = 2: 3;

95×( 3 2+3 - 2 2+3 )

=95×( 3 5 - 2 5 ),

=95× 1 5 ,

= 19 (piece).

That is, the difference between the two balls is 19.

Therefore, choose: d.

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