Find the wrong number in the following number series.

3, 4, 4.5, 11, 25, 80, 269.5

Correct option is E

Wrong term = 80
Pattern of series:
3 × 1 + 1 = 4
4 × 1.5 -1.5 = 4.5
4.5 × 2 + 2 = 11
11 × 2.5 – 2.5 = 25
25 × 3 + 3 = 78
78× 3.5 – 3.5 = 269.5