The answer depends on what you are selecting from. If you are selecting months in which the equinoces occur, the probability is 0.5
The probability is 0.4231, approx.
The probability of selecting a red card is 26 in 52 or 1 in 2. The probability of selecting an even card is 20 in 52 or 5 in 13. The probability, therefore, of selecting a red even card is 1 in 2 times 5 in 13 or 5 in 26.
Theoretical
The probability is 6/52 = 3/26.
From a 52 card deck, probability is 1/52.
Total number of months we use to have = 12. The month for required event is march. Quantity is one. Therefore, required probability = 1/12.
The probability is 0.4231, approx.
The probability of selecting a red card is 26 in 52 or 1 in 2. The probability of selecting an even card is 20 in 52 or 5 in 13. The probability, therefore, of selecting a red even card is 1 in 2 times 5 in 13 or 5 in 26.
The probability is 0.
It is 3/4.
The probability is 2:7.
Theoretical
The probability is 6/52 = 3/26.
From a 52 card deck, probability is 1/52.
Theoretical
P (selecting a king) = 4/52 = 1/13
The probability is 7:12... There are five months with less than 31 days, so the probability of selecting a month with exactly 31 days is 7 out of 12.