Statisticsmedium · Past Paper
A student's average marks in 5 subjects is 60. If the marks in the 6th subject is 90, what is the new average?
A60
B65
C70
D75
✓ Correct Answer: B — 65
Total marks for 5 subjects = 5 * 60 = 300. Total for 6 subjects = 300 + 90 = 390. New average = 390/6 = 65.
Share this question
More from Statistics
- If the mean of x, x+2, x+4 is 12, find x.
- Two dice are thrown. What is the probability that the sum is a multiple of 5?
- The sum of deviations of 10 values from 20 is 5. What is the mean?
- Determine the median of the following observations: 25, 30, 21, 15, 28, 35, 40, 12, 18.
- The mean of the first 50 even numbers is: