Tần số = 30

Số tuổi nghề = 6

Ta có : \(\overline{x}=6,\left(63\right)=\frac{663-6}{99}=\frac{657}{99}=\frac{73}{11}\)

=> \(\frac{5\cdot n+6\cdot5+9\cdot2+10\cdot1}{n+5+2+1}=\frac{73}{11}\)

=> \(\frac{5n+30+18+10}{n+8}=\frac{73}{11}\)

=>\(\frac{5n+58}{n+8}=\frac{73}{11}\)

=> \(11\left(5n+58\right)=73\left(n+8\right)\)

=> \(55n+638=73n+584\)

=> \(18n=54\)

=> \(n=3\)

Vậy n = 3

1. Eating out is expensive here. There aren't any cheap restaurant.

2. There are some shops near the university

3. There is a pancake in the fridge if you are hungry

4. How many lemons do you need for your lemonade ?

5. How much wine (rượu) does he drink a day ?

6. Would you some tea ?

1 Eating out is expensive here. There aren’t any cheap restaurants

2 There are some shops near the university

3 There is a.pancake in the fridge if you are hungry

4 How many Lemons do you need for your lemonade?

5 How much.wine does he drink a day?
6 Would you some tea ?

M

1 How many students are in the library?

2 How much did you save last year?

3 How many eggs do you need to make a birthday cake?

4 How many cups of coffee do you drink a day?

5 How many spoons should I add into the glass?

1 There are  20 students in the library - How many sutdents are there in the library

2 I saved  $2000  last year - How much did you save last year ? 

3 I need three   eggs to make a birthday cake - How many eggs do you need to make a birthday cake ?

4 I drink three cups of coffee a day - How many cups of coffee do you drink a day?

5 You should add three spoons of sugar into the glass - How many spoons of sugar should I into the glass

M

Chia động từ trong ngoặc ở hiện tại hoàn thành:

1. Moreover, the organization ( recently offer ).....................jobs for those people.

2. How long ( you / work ).....do you work....there?

3. What ( you / do )........will you do.........this summer?

4. My mother ( tell ) ....has tell.......me several times to go out ( finish )....to finish.........three books

5. The organization ( also plan ) .......also plan......... to have some voluntary programs to help disabled children.