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Find the mean of the following frequency...

Find the mean of the following frequency distribution: Classes:               0-20         20-40                            40-60       60-80                            80-100 Frequency:          15            18                            21            29                            17

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    X BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION-C|5 Videos

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X BOARD PREVIOUS YEAR PAPER ENGLISH-X Boards-All Questions
  1. Find the sum of first 25 terms of an A.P. whose nth term is 1- 4n

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  2. D and E are points on the sides CA and CB respectively of a triangle ...

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  3. Find the mean of the following frequency distribution: Classes:       ...

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  4. Cards marked with numbers 3, 4, 5, ......, 50 are placed in a box and ...

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  5. A washing machine is available for Rs. 13,500 cash or Rs. 6,500 as cas...

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  6. Solve the following system of equations graphically : 2x + 3y = 8 ; x ...

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  7. Simplify: x/(x-y)-y/(x+y)-(2x y)/(x^2-y^2)

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  8. Which term of the AP: 3, 15, 27, 39, . . . will be 132 more than its 5...

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  9. In a fig. PA is a tangent to the circle. PBC is a secant & AD bisects ...

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  10. Draw a triangle PQR with base QR = 6 cm, vertical angle P = 60° and me...

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  11. A toy is in the form of a cone mounted on a hemisphere of same radius ...

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  12. The enrolment of a secondary school in different classes is given belo...

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  13. A bag contains 5 red balls and some blue balls. If the probability of ...

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  14. (cosA)/(1-tanA)+(sinA)/(1-cotA)=sinA+cosA

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  15. Show that the points (7, 10), (-2, 5), and (3, -4) are the vertices of...

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  16. In what ratio does the line x -y - 2 = 0 divides the line segment join...

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  17. A man borrows money from a finance company and has to pay it back in t...

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  18. If a line is drawn to one side of a triangle to intersect the other tw...

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  19. Prove that the sum of opposite pair of angles of a cyclic quadrilatera...

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  20. The difference of two numbers is 5 and the difference of their recipro...

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