Probability Quiz 3
You might find it helpful to print out the quiz and give yourself time to think about the questions. Read each question carefully and choose the answer that you think is most likely to be correct. You can only choose one answer for each question. When you are ready, mark your answers in the spaces on the computer screen and click on the button 'Send answers'. Good luck!
1. What is the probability that a married couple will have three baby girls in a row?
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2. What is the probability of three 'sixes' turning up when you toss three dice?
3. A bag contains 2 black, 5 white, and 3 green marbles. If you randomly take one marble out of the bag at a time and don't put it back in, what is the probability that the first two marbles you draw will be black?
4. A flu epidemic hit a school with 456 pupils. It was estimated that the probability of catching the flu was 0.18. How many pupils can be expected to get sick?
5. 114 of the pupils in the school took flu shots before the epidemic set in. Now how many pupils can be expected to catch the flu?
7.
The probability tree below shows the possible outcomes of picking one marble and then another. What is the value of X?
X = ?
8. What is the value of y in the diagram above?
9.
If you draw one letter from each of the boxes A, B, and C, what is the probability that the letters drawn will form the word DEL?
10. What is the probability of getting 13 correct in the English lottery (1X2)?
Percentage answered correctly =