Statisticsmedium · Past Paper
If the sum of 10 observations is 150 and the mean of 5 of them is 10, what is the mean of the remaining 5?
A10
B20
C25
D15
✓ Correct Answer: B — 20
Total sum = 150. Sum of first 5 = 5 * 10 = 50. Sum of remaining 5 = 150 - 50 = 100. Mean = 100/5 = 20.
Share this question
More from Statistics
- If mean is 10 and median is 10, the distribution is likely:
- Find the mean: 1.5, 2.5, 3.5, 4.5.
- A data has mean 20. If 5 is added to each term, the coefficient of variation will:
- In a bar graph, if a bar of length 8 cm represents 400 units, what length will represent 1000 units?
- In a class, the probability of a student passing in Math is 0.8 and in Science is 0.7. If the probability of passing both is 0.6, what is the probability of passing in at least one?