Maths-

General

Easy

Question

# You ask 70 of your classmates if they have any siblings. complete the two-way frequency table to show the results of the survey.

Hint:

- Categories are labelled in the left column and top row.
- The counts are placed in the centre of the table.
- Totals appear at the end of each row and column.
- A sum of all counts (a grand total) is placed at the bottom right.

## The correct answer is: 125,75,200

- Two-way frequency chart

- Step 1:

Find b.

As, we know,

Totals appear at the end of each row and column

81 + b = 120

b = 120 – 81

b = 39

- Step 2:

Find d.

As, we know,

A sum of all counts (a grand total) is placed at the bottom right

120 + d = 200

d = 200 - 120

d = 80

- Step 3:

Find a.

As, we know,

Totals appear at the end of each row and column

a + 36 = d

a = 80 - 36

a = 44

- Step 4:

Find c

As, we know,

Totals appear at the end of each row and column

c + 75 = 200

c = 200 - 75

c = 125

- Final Answer:

Boys

Girls

Total

Yes

81

44

125

No

39

36

75

Total

120

80

200

Boys

Girls

Total

Yes

81

44

125

No

39

36

75

Total

120

80

200

### Related Questions to study

Maths-

### You ask 70 of your classmates if they have any siblings. complete the two-way frequency table to show the results of the survey.

### You ask 70 of your classmates if they have any siblings. complete the two-way frequency table to show the results of the survey.

Maths-General

Maths-