the average of four number is 25 . the average of the four is 23 when one of the number changed to 6. what is the original value of the changed number ??
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The average of four numbers is 25 .
The average of four numbers is 23 when a number changed to 6 .
Find the original value of the changed number .
Tự dịch câu hỏi trên và trả lời đáp số { nếu có thêm cách giải thì càng tốt }
Trung bình cộng của bốn số là 25
Trung bình cộng của bốn số là 23 khi một số bớt đi 6 đơn vị .
Tìm giá trị nguyên của số bị thay đổi đó .
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the average of five numbers is 20. The average of the five numbers is 18 when one of the numbers is changed to 4. What is the original value of the changed numbers
Trả lời
( 20 x 5 ) - ( 18 x 5 ) = 10
10 + 4 = 14
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the average of five numbers is 20. The average of the five numbers is 18 when one of the numbers is changed to 4. What is the original value of the changed numbers
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Câu 9:
The average mass of a group of children is 47kg. If of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
Câu 10:
A 6-digit number begins with the digit 8. The number is divisible by 9 and all digits of the number are different. What is the possible smallest value of this number?
Answer:
Câu 9 : 52 kg
Câu 10 : 801234
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9.Young male average weight is 47 kg + (47-39) = 55 kg
10. The minimum value is 800 001
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The average mass of a group of children is 47kg. If 5/13 of the number of children are girls and their average mass is 39kg. Find the average mass of the boys.
Answer: The average mass of the boys is kg
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Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?
Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?
Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?
Câu 5...
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Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?
Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?
Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?
Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?
Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…
Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?
Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…
Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?
Câu 9 : Calculate: (1 + 2/5) x 6/7.
Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.
câu 1:16 ; câu 2 : ai mà biết được
Câu hỏi 1:The average of three numbers is 1988. The first number is 1984. The third number is 2 units more than the second number. Find the third number.Câu hỏi 2:The average of 5 consecutive odd numbers is 123. Find the greatest number.Câu hỏi 3:Which of the following fractions is equal to 2/3?Câu hỏi 4:The average of two numbers is 95. The first number is 2/3 of the second number. Find the first numberCâu hỏi 5:Fill in the blank with the correct number: 6/100 kg .... kgCâu hỏi 6:The sum of tw...
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Câu hỏi 1:
The average of three numbers is 1988. The first number is 1984. The third number is 2 units more than the second number. Find the third number.
Câu hỏi 2:
The average of 5 consecutive odd numbers is 123. Find the greatest number.
Câu hỏi 3:
Which of the following fractions is equal to 2/3?
Câu hỏi 4:
The average of two numbers is 95. The first number is 2/3 of the second number. Find the first number
Câu hỏi 5:
Fill in the blank with the correct number: 6/100 kg = .... kg
Câu hỏi 6:
The sum of two fractions is 45/23 and the first fraction is one quarter of the second fraction. Find the first fraction.
Câu hỏi 7:
The sum of twonumbers is 463 and three are eighteen even numbers between these numbers. Find the greater number.
Câu hỏi 8:
Which of the following fractions is the greatest number?
Câu hỏi 9:
The average of two numbers is 95. The first number is 2/3 of the second number. Find these two numbers.
Câu hỏi 10:
The sum of the number of lions and monkeys in a zoo is 40 and lions are 1/3 the number of monkeys. How many monkeys are there in the zoo?
the average of 100 number is 42. The average of fist 50 number is 41. Then the average of the last 50 number ?
The average of 100 number is 42, so the sum of 100 number is : 42 x 100 = 4200
The average of first 50 number is 41, so the sum of first 50 number is : 41 x 50 = 2050
So the sum of the last 50 number is: 4200 - 2050 = 2150
Then the average of the last 50 number is : 2150 : 50 = 43
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the average of m and the greatest 4-digit number is 7625 the value of m is .....
The harmonic mean of a set of non-zero number is the reciprocal of the average of the reciprocals of the number. What is the harmonic mean of 1, 2, and 4?