The scores of students in their final examination in Mathematics in the Modern World are found to be normally distributed with a mean of 100 and a standard deviation of 10. Give the approximate percentage of students with a score of:*

below 120.

2 points

50%

85%

97.5%

47.5%

The scores of students in their final examination in Mathematics in the Modern World are found to be normally distributed with a mean of 100 and a standard deviation of 10. Give the approximate percentage of students with a score of:*

Above 110.

2 points

50%

84%

34%

16%

Give the mean scores of Richard in eight basketball games: 16, 18, 14, 19, 17, 20, 22, 18*

2 points

16

4

18

17

Machines A and B produce balls. The standard deviations of the weights of the identical balls produced by the machines A and B are 1 mg and 2 mg, respectively. Which of the machine produces balls with consistent weight?*

2 points

Both

Machine A

cannot be determined due to lack of data

Machine B