Question
Ying spins a spinner 75 times.
The table shows her results.
(a) Write down the relative frequency of the spinner stopping on blue.
(b) Tony spins the same spinner 450 times.
Find the expected number of times the spinner stops on yellow.
Answer/Explanation
(a)\(\frac{24}{75}oe\)
(b) 84
Question
One of the 6 letters is taken at random.
(a) Write down the probability that the letter is S.
(b) The letter is replaced and again a letter is taken at random.
This is repeated 600 times.
How many times would you expect the letter to be S?
Answer/Explanation
Ans:
(a) \(\frac{2}{6}\) oe
(b) 200 Final answer
Question
The probability of Sachin’s team winning any match is 0.45.
(a) Write down the probability of Sachin’s team not winning any match.
(b) In a season there are 40 matches.
How many matches should Sachin’s team expect to win in a season?
Answer/Explanation
Ans:
(a) [0].55 oe
(b) 18
Question
There are 31 days in January.
January 21st 2015 was a Wednesday.
What day of the week was February 8th 2015?
Answer/Explanation
Ans: Sunday