Find the mean of .
Answer and explanation
Correct answer: A.
- Step 1: Sum .
- Step 2: Mean .
Answer
.
Why not the others: is what you get if you give the median. is what you get if you give the range. is what you get if you forget to divide.
Practise more Sets, Statistics and Probability.
Free questions with an explanation for every one, and full timed GCE O/L Mathematics (Sri Lanka) mock tests.
More Sets, Statistics and Probability questions
- Two fair dice are thrown. Find the probability that the sum is .
- A box contains 7 red and 3 blue balls. Two balls are taken at random without replacement. Find the probability that they are of different co…
- In a group of students, study Sinhala, study Tamil and study both. How many study at least one of the two languages?
- The mean of and is . Find .
- Two fair dice are thrown. Find the probability that the sum is .
- A box contains 4 red and 7 blue balls. Two balls are taken one after the other without putting the first back. Find the probability that bot…