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Simple math.

Probability is equal to number of ways it can happen over number of total outcome


P = (n1 + n2 + n3 ...) / nTotal

So a coin has two sides so that means there only 2 possibility for that

While a cube has 6 possibility

The event will be done once.

You use the word and meaning that we should use multiplication to determine the number of total outcome


nTotal = 2 * 6

nTotal = 12

There are 3 even number in a cube (1, 3, and 5)

So it means we have to multiply 3 to number of ways in a coin which is 1

n1 = 3 * 1

n1 = 3

Lets now compute:

P = 3/12

P = 1/4

P = 0.25 or 25%

So it means there is a 25% probability that the coin will land tails up with an even number from the cube.

W can do this in list

Heads up(H)


Tails up(T)


A total of 12

Let's list the T with even number


We have 3

3/12 = 1/4 = 0.25 = 25%

I hope it helps.
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