1. Bi let Ba keep the kitten yesterday -> Bi allowed..Ba to keep the kitten yesterday.

2. The teacher didn't let the class leave before 4:30 -> The class.wasn't allowed to leave before 4:30..

3. I haven't heard from him for ages -> He.Hasn't been heard for ages..

4. The beach is quite near the hotel -> The beach is within.reach of the hotel..

5. John prefers windsurfing to sailing -> John would.rather windsurf than sail..

6. I haven't seen a play by Shakespeare for more than 10 years -> It's...10 years since I last saw a play by Shakedpeare

7. When we crossed the fields, we couldn't see the mountain because of the rain -> If.it hadn't been for the rain, we could have seen the mountain when we cross the fields

8. I was going to leave, but because of what she said, I didn't -> She persuaded...me not to leave

9. I didn't want to buy it, but because he insisted, I didn't -> He pushed...me on buying it

10. "You must think about it carefully before you decide", she told me -> She urged...me to think about  it carefully before I decided

11. "I am innocent" she said, and the court believe her -> She convinced the court that she were innocent

12. She says that it's good if I make my own decisions -> She encourages...me to make my own decision

13. Please check for damage before signing the delivery note -> Don't sign the delivery note before cheking for damage

14. I need an early night -> I could do good with an early night.

An:6

Bảo:10

Minh:14

They let her enter the house.

1. The lecturer splits the students into four groups (divided)

The lecturer divided the students into four groups

2. My parents doesn't let us go out at night (allowed)

We are not allowed to go out at night

3. The acupuncturist will ask the patient to lie down (required)

The patient will be required to lie down by the acupuncturist

4. Mr S doesn't let us play football on the street (allowed)

We are not allowed to play football on the street by Mr S

1. The lecturer splits the students into four groups (divided)

The lecturer divided the students into four groups

2. My parents doesn't let us go out at night (allowed)

We are not allowed to go out at night

3. The acupuncturist will ask the patient to lie down (required)

The patient will be required to lie down by the acupuncturist

4. Mr S doesn't let us play football on the street (allowed)

We are not allowed to play football on the street by Mr S

1. The lecturer splits the students into four groups (divided)

The lecturer divided the students into four groups

2. My parents doesn't let us go out at night (allowed)

We are not allowed to go out at night

3. The acupuncturist will ask the patient to lie down (required)

The patient will be required to lie down by the acupuncturist

4. Mr S doesn't let us play football on the street (allowed)

We are not allowed to play football on the street by Mr S

số bi đỏ trong hộp là :

84*3/7= 36 viên 

số bi xanh trong hộp là :

84-36 = 48 viên

đ/s : 48 viên 

k mk nha mn 

Số bi đỏ là:

84:7x3=36(viên bi)

Số bi xanh là:

84-36=48(viên bi)

Đ/S:48 viên bi

nam:32 viên bi

hòa:27 viên bi

bình:16 viên bi

Số bi của Nam lúc đầu là :

25 + 7 = 32 ( viên )

Số bi của Hòa lúc đầu là :

25 - 7 + 9 = 27 ( viên )

Số bi của Bình lúc đầu là :

27 - 9 = 18 ( viên )

Đáp số : ... 

Bài vừa nãy mình làm sai , để mk làm lại như sau :

Số bi của Nam lúc đầu là :

25 + 7 = 32 ( viên )

Số bi của Hòa lúc đầu là :

25 - 7 + 9 = 27 ( viên )

Số bi của Bình lúc đầu là :

25 - 9 = 16 ( viên )

Đáp số : ... 

Tổng tất cả là 18 viên, lấy 3 viên bất kì, ta có OMEGA=18C3

Chọn 3 viên đỏ trong tổng 4 viên đỏ, là 4C3

Vậy xác xuất xảy ra cả 3 viên đều đỏ là \(\dfrac{C^3_4}{C^3_{18}}\)=\(\dfrac{1}{204}\)

My boss allowed her worker to use the telephone.

My boss allowed her workers to use the telephone