Question

1 - The average of 7.5 , 3.2 , 11.3 , 20.5 and x is 10 find the value of x.


2 - 30 pens and 75 pencils for purchased for 510. If the average price of a pencil was 2 , then find the average price of a pen.

3 - The average of 5 quantities is 6. The average of 3 of them is 4. What is the average of remaining two quantities.

4 - The average age of 40 students In a class is 15 years. When 10 new students are admitted the average is increased by 0.2 year. Find the average students age of new students.

5 - The average age of 4 sisters 7 years. If the age of mother is included the average is increased by 6 year find the age of mother.

6 - The age of Ajay , Vikrant , Amit and Satish is 10 year , 12 year and 14 year find the average age of Ajay, Vikrant , Amit and Satish.

7 - The average weight of a group of 75 girls was calculated as 47 kg. It was later discovered that the weight of one of the girl was read as 45 kg where as her actual weight is 25 kg . What is the actual average weight of the group of 75 girls.


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DETAILS ARE GIVEN BELOW


CHAPTER NAME : AVERAGE
BOOK NAME : SAINIK SCHOOL
CLASS : SIXTH


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Answer 1

Answer:

first one is 7.5

Step-by-step explanation:

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