Lingling has 95 red and blue balls * * *, and 50% of the red balls have as many as 13 of the blue balls, so the difference between the two balls is (). a . 16b . 17c . 18d . 1。
The ratio of red ball to blue ball is13: 50% = 2: 3;
95×(32+3-22+3)
=95×(35-25),
=95× 15,
= 19 (piece).
That is, the difference between the two balls is 19.
Therefore, choose: d.