Probability

路过的朋友，帮忙算一算以下几题Probability

这是我GEM2900 Understanding Uncertainty & Statistical Thinking 的 Assignment
不需要很高深的数学算式，SPM 就做得出的
还没拿GEM的朋友，可以考虑拿这科来玩玩
很有趣！！
但不要抱太大希望拿 A
因为里面有太多 Math Major 的人


Q1)
3 cards drawn, one at a time without replacement, from a deck of cards.
What's the probability that first a spade is drawn, then a queen, then a diamond?


Q2)
There're 3 cards:
- A black card which is black on both sides
- A red card which is red on both sides
- A mixed card which is red on one side and black on the other
Draw a card and place on table. The face showing upward is black.
What's the probability that the other side is also black?


Q3)
A mother has 2 children. One of them is a daughter.
What's the probability that the other child is a girl?


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