At least how many of 119 children that were born in the same month?
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there were 550 students who participated in a quiz of 5 math problems, and 2011 problems were solved correctly in all. it is found out that every participant solved correctly at least 1 problem. it also know that 59 students got 1 problem correct, 69 students were able to answer all problem correctly while the number of students who 2 correct and 3 correct answer were the same. how many of the students got 4 correct answers
16 sparrows were resting on 2 lamp post2 sparrow flew from the first to the second lamp post3 sparrows flew from the second to the first lamp posts .The number of sparrows on the first and the second lamp posts became the same.How many sparrows on each lamp post at first.giúp mik thêm bài này zới:There are 30 days in the month of April.31 students will be celebrating their birthdays in that monthCan you find 2 student who were born on the same day? Why?cảm ơn các bn rất nhiều, các bn làm đc bài...
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16 sparrows were resting on 2 lamp post
2 sparrow flew from the first to the second lamp post
3 sparrows flew from the second to the first lamp posts .
The number of sparrows on the first and the second lamp posts became the same.
How many sparrows on each lamp post at first.
giúp mik thêm bài này zới:
There are 30 days in the month of April.31 students will be celebrating their birthdays in that month
Can you find 2 student who were born on the same day? Why?
cảm ơn các bn rất nhiều, các bn làm đc bài nào thì chỉ mik zới nhé
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.
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sophie colors this picture so that no neighbouring regions have the same color. how many types of colors at the least?
các bn ghi cách làm ra nha, mik bít đáp án là 3 nhưng ko bít cách làm
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câu này có đúg cấu trúc ko bạn,sophie làm j có nghĩa
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Sophie colours this picture so that no neighbouring regions has the same colour. How many types of colours at the least does she need to use.
giúp mik câu này zới:
There were 13 commuters on the eastbound subway train.
Carl told his mum that at least 2 of the commuters were born in the same month of the year.
Was Carl correct?
cảm ơn các bạn rất nhìu
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~
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In a PE room, a basket contains some red, orange, yellow and green bean bags. How many students must the PE teacher send so that at least 2 students will draw 3 bags of the same colour combination? Each student is allowed to draw 3 bean bags
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 lan...
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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
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.
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3. Students in a primary school are either wearing blue, black or yellow cap. At least how many students are there to ensure there are 26 students wearing the same colour of cap?
There are 4 pieces of white chopsticks, 5 pieces of yellow chopsticks and 6 pieces of blue chopsticks mixed together. If you want to get 2 pairs of chopsticks with the same colour in the dark, at least how many pieces of chopsticks should be taken?