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Mean of twenty observations is 15. If tw...

Mean of twenty observations is 15. If two observations 3 and 14 replaced by 8 and 9 respectively, then the new mean will be

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The mean of twenty observations is 15. If two observations 3 and 14 are replaced by 8 and 9 respectively, then what will be the new mean.

Mean of 20 observations is 17. If observation 40 is replaced by 12, then the new mean is

Mean of n observations x_1,x_2 ,…., x_n is barx . If an observation x_q is replaced by x'_q , then the new mean is :

The mean of 100 observations is 50. If one of the observations which was 50 is replaced by 150, the resulting mean will be

The mean of 100 observations is 50. If one observation which was 60 is replaced by 160, the resulting mean will be:

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AGRAWAL PUBLICATION-(2019) QUESTION PAPER-EXAMPLE
  1. Mean of twenty observations is 15. If two observations 3 and 14 replac...

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  2. Check whether g(x) is a factor of P(x) by dividing polynomial p(x) by ...

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  3. Find the area of the triangle formed by joining the mid-points of the ...

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  4. Draw the graph of the equations x-y+ 1 = 0 and 3x + 2y - 12 = 0. Using...

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  5. Prove that sqrt 3 is an irrational number.

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  6. Find the greatest number which on dividing 1251, 9377 and 15628 leaves...

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  7. A,B and C are interior angles of a triangle ABC. Show that sin[(B+C)/2...

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  8. If angle A = 90^@, then find the value of tan [(B + C)/2]

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  9. If tan(A +B) = 1 and tan(A - B) = 1/ sqrt 3, 0^@ < A + B < 90^@, A>B, ...

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  10. In Figure, PQ is a chord of length 8 cm of a circle of radius 5 cm. Th...

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  11. Prove that opposite sides of a quadrilateral circumscribing a circel s...

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  12. Water in a canal, 6 m wide an 1.5 m deep, is flowing with a speed of 1...

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  13. A class teacher has the following absentee record of 40 students of a ...

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  14. A car has two wipers which do not overlap. Each wiper has a blade of l...

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  15. A pole has to be erected at a point on the boundary of a circular park...

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  16. If m times the m^(th) term of an Arithmetic Progession is equal to n t...

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  17. The sum of the first three numbers is an Arithmetic Progression is 18....

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  18. Construct a triangle ABC with side BC = 6 cm, AB = 5 cm and angle ABC ...

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  19. In Figure, a decorative block is shown which is made of two solids, a ...

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  20. In Figure, a decorative block is shown which is made of two solids, a ...

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  21. A bucket open at the top is in the form of a frustum of a cone with a ...

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