Malka Hayu secondary School Mathematics Worksheet for Grade 12

Find the mean,median and modes of the numbers 2, 3, 4, 2, 3, 6, 4, 3, 7, 4, and 6.

1. What is the mean?

• 4

• 5

• 3 and 4

• 3 and 5

Answer explanation

To find the mean, sum the numbers: 2+3+4+2+3+6+4+3+7+4+6 = 45. Then divide by the count of numbers (11): 45/11 = 4. Therefore, the mean is 4.

Depending on Question number #1, what is the median?

• 5

• 3 and 4

• 4

• 6

Answer explanation

To find the median, arrange the numbers in order. If the data set is {3, 4, 5, 6}, the middle value is 4, making it the median. Thus, the correct answer is 4.

What is the mode of the numbers 1, 2, 2, 3, 4, 4, 4, 5, 6?

• 1 and 2

• 4

• 3

• 2

Answer explanation

The mode is the number that appears most frequently in a data set. In the list 1, 2, 2, 3, 4, 4, 4, 5, 6, the number 4 appears three times, more than any other number, making it the mode.

Calculate the mean of the following set of numbers: 10, 20, 30, 40, 50.

What is the mean?

• 30

• 25

• 35

• 40

Answer explanation

To find the mean, add all the numbers: 10 + 20 + 30 + 40 + 50 = 150. Then divide by the count of numbers (5): 150 / 5 = 30. Thus, the mean is 30.

Given the numbers 8, 9, 10, 10, 11, 12, what is the range?

• 3

• 4

• 5

• 2

Answer explanation

The range is calculated by subtracting the smallest number from the largest. Here, the smallest number is 8 and the largest is 12. Thus, 12 - 8 = 4. Therefore, the correct answer is 4.

In a company having 120 employees, 40 earn 500 Birr per month, 30 earn 420 Birr per month, and the rest earn 300 Birr per month. Determine the mean earning per month.

• 47600/100

• 47600/120

• 47600/300

• 47600/130

Calculate the mean of the following set of numbers: 15, 25, 35, 45, 55.

What is the mean?

• 35

• 30

• 40

• 25

In a class of 150 students, 50 scored 80 marks, 60 scored 70 marks, and the rest scored 60 marks. What is the mean score?

• 65

• 70

• 80

• 75

Given the numbers 5, 7, 8, 8, 9, 10, what is the mode?

• 9

• 7

• 10

• 8

• 8/5

• 8/7

• 8/3

• 8/9