Conditional Probability
A survey on the preference for great composers in the 20 century was conducted to 100 music critics. A part of the result is shown in the table below. What is the probability that a randomly chosen critic likes Stravinsky?
Xander flips a coin and tosses a 6-sided dice. What is the probability that either the coin lands on Heads, or the dice lands on 4?
100 high school students are asked if they speak French. 70% of male students answer that they do not speak French, while 40% of female students answer they speak French. It is known that 40% of the responding students are female. If a randomly chosen student answers that he/she speaks French, what is the probability that this student is a female?
In a school, of the students are female, and of the students walk to school. If of the students are female and walk to school, what is the probability that a randomly chosen student is female or walks to school?
A card is drawn randomly from a standard deck of cards. What is the probability that the card drawn is a 2 or a Spade?
Details and Assumptions:
A standard deck of cards consists of 52 cards, formed by 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen and King) of 4 suits (clubs, diamonds, hearts and spades).