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Choose the correct alternative for each of the following questions :
The class mark of the class `2000-2500` is taken as the assumed mean. What is the value of the deviation `d_i` for the class ``2500-3000?`

A

(a) -500

B

(b) 500

C

(c) 0

D

(d) 1000

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Knowledge Check

  • Choose the correct alternative for each of the following question (49)^3=

    A
    118649
    B
    127649
    C
    117649
    D
    128649

  • Choose the correct alternative for each of the following question (a-b)^3=

    A
    `a^3 +b^3 +3ab(a-b)`
    B
    `a^3 +b^3 -3ab(a-b)`
    C
    `a^3 -b^3 -3ab(a-b)`
    D
    `a^3 -b^3 -3ab(a+b)`

  • Choose the correct alternative for each of the following question: a^3 - b^3 =

    A
    `(a-b) (a^2 +ab+b^2)`
    B
    `(a+b) (a^2 -ab+b^2)`
    C
    `(a-b) (a^2 +ab-b^2)`
    D
    `(a-b) (a^2 +ab-b^2)`

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