GRADE 7 PROBABILITY & STATISTICS (1998)
Tom spun the spinner shown below 60 times. (Note that the spinner is a fair spinner.) His results are in the table below the spinner. Use this information to answer the following questions.
| |
1. (a) What fraction of the spins resulted in a B?
(Express your answer in fraction form.)
_____________________________
(b) What is the theoretical probability of spinning a B?
(Express your answer in fraction or decimal form.)
_____________________________
(c) Out of 60 spins, how many spins would theoretically be a B?
_____________________________
2. Joey Cora follows Jay Buhner in the Mariners' batting order. Jay Buhner hits the ball 1/3 of his times at bat, and Joey Cora connects with the ball 32.1% of the time. If they both come up to bat, what is the probability that they both get hits?
_____________________________
3. Mary's final exam scores for 1992-1996 are indicated in the graph at right. Mary took exams in 1997 and 1998. Her mean score for the years 1992-1998 was 82. What was the sum of Mary's scores for 1997 and 1998?
_____________________________
4.A company is creating new employee identification codes for its employees. Each employee's identification code will be made of 1 capital letter followed by 2 single-digit numbers (such as Q13). The letters O and I will not be used in these codes.
(a) How many different employee codes are available to this company?
_________________________________
(b) How many employee codes would be available to the company if the two digit number of the code could not contain the same two digits?
_________________________________
5. A student reaches three times into a fruit basket containing 4 apples, 4 oranges, and 4 bananas to get 3 pieces of fruit.
(a) How many different collections (or combinations) of 3 pieces of fruit could the student get?
_________________________________
(b) What is the probability that the student will get 3 of the same fruit? (Express your answer in fraction form.)
_________________________________