Which of the following is a source of variation:   A) Materials   B) Piece-to-piece   C) Chance   D) None of these

One card is drawn from a standard deck of 52 cards. What is the probability that it is: a) a spade? b) a face card? c) a black ace? d) a black card and a seven? e) a black card or a seven? a face card or a heart? g) a face card and a heart?

Determine to which probability assignment approach the following statements belong and justify your answer. a) There is a 20% probability that it will rain because it has rained 2 of the previous 10 days. b) According to the experts, there is a 5% probability that a car will have an accident in the field, since it is considered that the risk is lower. c) There is a 50% probability of choosing a boot since there are 10 boots among the 20 available shoes.

Edward has to take a five question multiple-choice quiz and his socialolgy class.  each question asked four choices for answers of which only one is correct. assuming that edwards guesses on all five questions. what is the probability that he will answer a) all five questions correctly b) exactly 2 questions correctly c) at least two questions correctly

I can not tell what the answer is. Which is correct? I have a selection of 5 events as follows: a) The marble selected is white b) The marble selected is odd c) The marble is both white and odd d) The marble selected is either white or odd e) Assuming it is a white marble, the probability it is even

200 students were surveyed about sports they regularly participate in. a) How many don't participate in any of these sports? b) How many participate in volleyball? Football 10 Volleyball 10 c) How don't participate in basketball? 22 d) How many participate in both football and volleyball? 3 Basketball e) Wnaris une provabimy unat a student chosen at random from this group plays both volleyball and basketball? 12 f) What is the probability that a student chosen at random from this group plays both football and volleyball but not basketball? g) What is the probability that a student chosen at random from this group plays only one sport? h) What is the probability that a student chosen plays football or basketball given that they play volleyball?