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13 tháng 4 2020

Ít nhất có bao nhiêu trong số 119 đứa trẻ được sinh ra trong cùng một tháng?

ko hiểu câu hỏi lắm

.................

13 tháng 4 2020

Ít nhất có bao nhiêu trong số 119 đứa trẻ được sinh ra trong cùng một tháng?

# hok tốt #

16 tháng 6 2018

Bài 1: First task:

Let \(x\) be the number of sparrows on the first lamp post at first. (\(x\) is a positive integer).

\(\Rightarrow16-x\)is the number of sparrows on the second lamp post at first.

We have: \(x-2+3=16-x+2-3\Leftrightarrow2x=14\Leftrightarrow x=7\)

Hence there are 7 sparrows on the first lamp post at first, 9 sparrows on the second lamp post at first.

Bài 2: Second Task

We can find 2 students who were born on the same day.

There are 30 days in April and 31 students were born on that month. Apply the Dirichlet 's theorem, we can ensure that threre exists at least one day where 2 students were born.

7 tháng 5 2016

các bn ghi cách làm ra nha, mik bít đáp án là 3 nhưng ko bít cách làm

7 tháng 5 2016

câu này có đúg cấu trúc ko bạn,sophie làm j có nghĩa 

13 tháng 6 2018

Carl was correct

Each year has 12 months and there are 13 commuters on the eastbound subway, so at least there are 2 commuters were born in the same month

~Hok tốt nha~

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.By adopting a few simple techniques, parents who read to their children can substantially increase their children’s language development. It’s surprising, but true. How parents talk to their children makes a big difference in the children’s language development. If a parent encourages the child to actively respond to what the parent is reading, the...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

By adopting a few simple techniques, parents who read to their children can substantially increase their children’s language development. It’s surprising, but true. How parents talk to their children makes a big difference in the children’s language development. If a parent encourages the child to actively respond to what the parent is reading, the child’s language skills increase.

A study was done with 2 to 3 year-old children and their parents. Half of the thirty children participated in the experimental study; the other half acted as the control group. In the experimental group, the parents were given a two-hour training session in which they were taught to ask open-ended questions rather than yes/no questions. For example, the parent should ask, “what is the doggie doing?” rather than, “Is the doggie running away?” Experimental parents were also instructed in how to expand on their children’s answers, how to suggest alternative possibilities, and how to praise correct answers.

At the beginning of the study, the children did not differ on measures of language development, but at the end of one month the children in the experimental group tested 5.5 months ahead of the control group on a test of verbal expression and vocabulary. Nine months later, the children in the experimental group still showed an advance of 6 months over the children in the control group.

 

How many children were there in the study?

A. 2 or 3

B. 15

C. 30

D. 60

1
24 tháng 3 2018

Chọn C

Câu 2 đoạn 2 “Half of the thirty children participated in the experimental study” một nửa trong số 30 trẻ tham gia nhóm thực nghiệm.

22 tháng 11 2023

Vậy là toán dữ chưa ?