A) -2 + i
B) -2 - i
C) 2 + i
D) 2 - i

f(i) = i³ - 2i² = i(i²) - 2i² = -i + 2 = 2 - i

2-i, last choice

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500