Twelve inches is cut from a board. The remaining board is 18 inches long. How long was the board before it was cut? Write only the number.

Total length  = Amount cut off +  amount remaining.

Total length = 12 + 18 = 30 inches

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

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step-by-step explanation: