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The mean of first 10 natural numbers....

The mean of first 10 natural numbers.

A

25

B

55

C

`5.5`

D

`2.5`

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Knowledge Check

  • Two numbers a and b are chosen at random from the set of first 30 natural numbers. The probability that a^(2)- b^(2) is divisible by 3 is

    A
    `(47)/(87)`
    B
    `-(47)/(87)`
    C
    `(46)/(47)`
    D
    `(45)/(87)`

  • The variance of first 10 natural numbers is:

    A
    `99/12`
    B
    `100/12`
    C
    `101/12`
    D
    `sqrt((99)/(12))`

  • What is the the sum of first 30 natural numbers? A)464 B)465 C)462 D)461

    A
    464
    B
    465
    C
    462
    D
    461

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    Find the standard deviation of first 21 natural numbers.

    What is the sum of first n natural numbers ?

    The mean of the square of first 11 natural numbers is

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