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Find the average mark from the following...

Find the average mark from the following :

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The correct Answer is:
51.75
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If the average mark of 15 students is 60 and the average mark of another 10 students is 70, then find the average mark of 25 students. The following are the steps involved in solving the above problem. Arrange them in sequential order. (A) Average marks of 25 students = (1600)/(25) = 64 (B) The total marks of 15 students = 15 xx 60 = 900 The total marks of 10 students = 10 xx 70 = 700 (C) The total marks of 25 students = 900 + 700 = 1600

In a class of 50 students 10 have failed and their average of marks is 2.5 . The total marks secured by the entire class were 281. Find the average marks those who have passed.

In a class of 15 students, the total marks obtained by all the students in a test is 600. Find the average mark of the class.

SK AGGARWALA-ARITHMETIC MEAN-Exercise ( Numerical Exercises )
  1. Solve Q.1 by step deviation method.

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  2. An opinion poll was conducted by interviewing 150 people. Calculate th...

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  3. A survey of monthly incomes of 100 families living in a village was co...

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  4. Calculate average cost of cultivation per quintal of wheat from the fo...

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  5. Calculate (a) unweighted and (b) weighted mean price from the followi...

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  6. Calculate the simple arithmetic mean of the pocket money of the 8 stud...

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  7. Sachin Tendulkar scored the following runs in the World Cup Cricket 20...

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  8. Per Capita income ( at 1993-94) of India during 1991-1992 to 2001-02 i...

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  9. Given yield per hectare of food grains in India during 1995-96 and 200...

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  10. Frequency distribution of cost of production per unit of a good is giv...

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  11. Calculate (i) the unweighted mean of prices and (ii) the mean obtained...

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  12. A student obtains the following percentage in an examination. (i...

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  13. The mean height of 20 girls in section A of a class is 155 cm, and tha...

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  14. Gross Enrolment Ratio (GER) in classes I-V for boys and girls in the 3...

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  15. Percentage of households having access to safe drinking water in 31 St...

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  16. Find the average mark from the following :

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  17. Find the average cost of production ( in Rs per unit ) in factories i...

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  18. Calculate the average daily earnings of emplyees.

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  19. Caculate the average number of days of absence by students from school...

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  20. Calculate average number of marks by student in a class. Note: I...

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