Which is equivalent to (8x4x2/8x7)^2 x (8^0/7^-3)^3 x 7-9 64/49, 8/49, 16/7, or 512/7

64/49

Step-by-step explanation:

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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