2- 其他数学问题 请数学高手帮帮我解答 >< 不会这题 给十分 (不是要翻译 需要解答)

2- 其他数学问题 请数学高手帮帮我解答 >< 不会这题 给十分 (不是要翻译 需要解答)
以下是我不会的英文数学问题 厉害的高手 请帮我解答一下问题 拜托了
3.An experiment consists of selecting a card at random from a desk of 52 cards. The following are 4 possible events :
A: obtaining a face card
B: obtaining a king
C: obtaining a red card
D: obtaining a heart
Calculate :
a)P(B/A) =
b)P(B/C) =
c)P (B/D) =
d)P(C/A) =
e)P(C/B) =
f)P (D/C) =
4.A random experiment consists of rolling a twelve-sided die numbered 1 to 12 and observing the top face.
What is the probability of obtaining :
a)An even number given that the number obtained is greater than 6 ?
b)A divisor of 24 , given that the number obtained is less than 9 ?
c)A multiple of 3 given that the number obtained is at least 7 ?
d)A prime number given that the number obtained is greater than 5 ?