Home
Class 11
MATHS
If the standard deviation of the numbers...

If the standard deviation of the numbers 2, 3, a and 11 is 3.5, then which of the following is true ? (1) `3a^2-26 a+55=0` (2) `3a^2-32 a+84=0` (3) `3a^2-34 a+91=0` (4) `3a^2-23 a+44=0`

A

`3a^2 -32a+84=0`

B

`3a^2 -34a+91=0`

C

`3a^2-33a+44=0`

D

`3a^2 - 26a+55=0`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    MODERN PUBLICATION|Exercise Chapter Test|7 Videos

  • STATISTICS

    MODERN PUBLICATION|Exercise Check your understanding|10 Videos

  • SETS

    MODERN PUBLICATION|Exercise CHAPTER TEST 1|12 Videos

  • STRAIGHT LINES

    MODERN PUBLICATION|Exercise Chapter test|12 Videos

Similar Questions

Explore conceptually related problems

Solve the following equations : 0.2x+0.3y=1.3 0.4x+0.5y=2.3

Which of the following will come next in the following sereis? 0 9 0 1 9 0 1 2 9 0 1 2 3 9 0 1 2 3 4 9 0 1 2 3 4 5 9 0 1 2 3 4 5

In the following number series how many 0's are there which are immediately preceded by a pair of numbers whose product is more than the product of the pair of numbers immediately following it ? 4 8 0 9 2 5 0 3 0 1 9 6 0 4 3 7 8 0 3 2 4 0 3 2 0 0 9 8 6 2 0 5 3 1) 4 2) 5 3) 6 4) 2 5) None of these

If A=[[1,2],[3,4]] and B=[[2,3],[4,5]] , then find A+B-C=0 , then find C.

Show that the points (3,-1,-1),(5,-4,0),(2,3,-2) and (0,6,-3) are the vertices of a parallelogram

Show that the points (3,-1,-1),(5,-4,0) ,(2,3,-2) and (0,6,-3) are the vertices of a parallelogram

If |[2x-3,2],[9,1]|=0 then the value of x is