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10 tháng 8 2018

I feel you should answer yourself

11 tháng 6 2016

Khi John lấy 5 quả bóng, kết quả có thể là 3 xanh và 2 đen. Chưa được 4 quả cùng màu.

Trong 3 loại đỏ, trắng, vàng còn lại, John phải lấy thêm ít nhất 10 quả nữa để chắc chắn có 4 quả cùng màu vì: 10 chia 3 bằng 3 dư 1. 4 quả ấy bao gồm 3 quả là Thương cộng 1 quả là Dư.

Vậy John phải lấy ít nhất 15 quả bóng để chắc chắn có 4 quả cùng màu.

7 tháng 11 2021

15 :V

7 tháng 11 2021

14

 

7 tháng 6 2018

Có một số quả bóng trong túi. Phần còn lại là 1 khi nhóm 3 quả bóng được lấy ra. Phần còn lại là 2 khi các nhóm 5 hoặc 7 quả bóng bị loại bỏ. Số lượng quả bóng nhỏ nhất có thể có trong túi là bao nhiêu?

The number of ways is : \(\frac{9\cdot8\cdot7\cdot6\cdot5}{120}=126\) ( ways )

Ans:126 ways 

6 tháng 12 2017

khoe tiếng anh à :)))

Gọi số bóng đỏ là a

số bóng xanh là b

ta có:

a = 5 x b

a = 4 x (b + 3)

suy ra: 5 x b = 4 x (b + 3)

5 x b = 4 x b + 12

b = 12.. Suy ra a = 60

Nhớ bấm   L I K E   cho mk nhá :))))

5 tháng 8 2016

7 balls

31 tháng 7 2016

The number of balls to get off to a 3 color is:
3 + 3 + 1 = 7 (balls)
Answer: 7 balls

20 tháng 7 2016

sao toan la TA ko z

Fill in the gap with one suitable words Enrico Rastelli Enrico Rastelli was probably the greatest juggler the world has ever known. Juggling involves throwing(1)........................number of objects up into the air and catching them (2)................dropping a single one. Rastelli was able to juggle(3)..............many as eight balls at the same time. However,(4).............made him a genius was his perfect style, rather(5)...................the quantity of objects...
Đọc tiếp

Fill in the gap with one suitable words

Enrico Rastelli

Enrico Rastelli was probably the greatest juggler the world has ever known. Juggling involves throwing(1)........................number of objects up into the air and catching them (2)................dropping a single one. Rastelli was able to juggle(3)..............many as eight balls at the same time. However,(4).............made him a genius was his perfect style, rather(5)...................the quantity of objects he(6)..........juggle.

Rastelli's contributions to juggling were many. He started using rubber balls(7).........of the cotton balls that were(8)...............use at the time.These rubber balls are now standard. It was Rastelli,too, who began the now commonly seen practice(9)..............throwing a ball into the air,and then catching(10)....................on a stick held in his mouth.

Enrico Rastelli was born into a circus family in Siberia in 1896. Although he spent some of his early years in Italy, it(11)...............in Russia that he acquired his juggling skills. It was not uncommon(12).............him to practise twelve hours a day, and this dedication was reflected in his astonishing performances. The degree of control shown(13)..............Enrico Rastelli has never been equalled.

1
23 tháng 1 2019

Fill in the gap with one suitable words

Enrico Rastelli

Enrico Rastelli was probably the greatest juggler the world has ever known. Juggling involves throwing(1)....a.....number of objects up into the air and catching them (2).....without......dropping a single one. Rastelli was able to juggle(3)....as.....many as eight balls at the same time. However,(4)....what......made him a genius was his perfect style, rather(5).......than......the quantity of objects he(6)...could.....juggle.

Rastelli's contributions to juggling were many. He started using rubber balls(7)...instead....of the cotton balls that were(8)......in...use at the time.These rubber balls are now standard. It was Rastelli,too, who began the now commonly seen practice(9).....of.....throwing a ball into the air,and then catching(10)........it....on a stick held in his mouth.

Enrico Rastelli was born into a circus family in Siberia in 1896. Although he spent some of his early years in Italy, it(11)......was.......in Russia that he acquired his juggling skills. It was not uncommon(12).....for...him to practise twelve hours a day, and this dedication was reflected in his astonishing performances. The degree of control shown(13)....by......Enrico Rastelli has never been equalled.