P(Winning) = 50/700 = 0.0714... ≈ 7.14 %

Leaving aside leap years, the probability is 0.0137

11 outcomes if the dice are indistinguishable, 36 otherwise.

Yes.

Two events are equally unlikely if the probability that they do not happen is the same for each event. And, since the probability of an event happening and not happening must add to 1, equally unlikely events are also equally likely,

4

If the marbles are all red - 100%. You need to give the number of each different colored marble

The mean value of 100, 70, 70, and 20 is 65

There is not enough information to answer your question. To determine a Z-Score, the mean and standard deviation are also required.

The probability of tossing a coin twice and getting tails both times is 1 in 4, or 25%.

If you have already tossed a coin and had it land on tails, the probability that it will land on tails again the next time you toss it is 50%.

Because of the Law of Large Numbers. According to that law, the observations tends towards the mean. This increases the concentration of observations nears the mean thereby reducing the variance or standard error.

It is 0.6

There are 360.

It is approx 78.8%

On a roll of two dice, the chance of rolling a 3 (one and two) is 2 in 36, or 1 in 18 when reduced.

360 times

A simple random sample or a probability sample.

Normally 5/26 but if you count "y" as a vowel, 6/26 or 2/13.

It is always 50/50.

There are 30 of them.

3/4

It is the description of z as the lower quartile.

Assuming it is a fair coin, P(6H in 10 tosses) = 10C6 * (1/2)6*(1/2)(10-6) = [10*9*8*7/(4*3*2*1)]/210

=210/1024 = 0.2051

3/4