N is a positve integer explain why n(n-1) must be an even number Explain why 2n + 1 must be an odd number

i just took the test, the correct answer is .. 31.5 in.

i think the answer is b

many reason,

step-by-step explanation:

step-by-step explanation:

a cube has 6 sides

the probability of getting 5 on the first cube is 1/6 since only one side of the cube has 5 on it.

there are 3 sides of the cube with even number on it [2,4,6]

therefore the probability of getting even number is 3/6

for both events to happen together, the probability would be

1/6 x 3/6 = 12/36

which simplifies to 1/12