Subject: Maths, asked on 2/3/18

## X^2 + x/4 - 1/8

Subject: Maths, asked on 2/3/18
Subject: Maths, asked on 20/2/18

## Find the mean,variance and standard deviation C.I. 0-10  10-20  20-30  30-40  40-50  50-60  60-70  70-80  80-90  90-100 Freq   18    16       8           15           12    10      15            2       3          1

Subject: Maths, asked on 8/2/18

## Answer this please! Calculate mean, Variance and standard deviation for the following distribution Classes:      30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency:     3        7       12     15        8       3         2

Subject: Maths, asked on 7/2/18

## ​​Calculate mean,variance,standard deviation for the following distribution ​Classes- 30-40   40-50   50-60  60-70  70-80  80-90   90-100 frequency 3          7          12        15         8            3        2

Subject: Maths, asked on 1/2/18

## Solve this:

Subject: Maths, asked on 28/1/18

## tell me the answer for the 11th question. please answer me quickly Q.11. The marks obtained by 7 students are 8, 9,11, 13, 14, 15, 21. Find the variance and standard deviation of these marks.

Subject: Maths, asked on 29/12/17

## Pls solve my query Can anyone explain how these formulae are same????

Subject: Maths, asked on 13/12/17

## If the variance of the scores a, 4, 6, b and 10 is 8, then the possible values of a and b are:  a. 2 and 8 b. 3 and 5 c. 4 and 5 ​d. 2 and 4

Subject: Maths, asked on 12/11/17

## 9th 9.  The variance of 20 observations is 5. If each observation is multiplied by 2, then find the variance of the resulting observations.

Subject: Maths, asked on 12/11/17

## 7th. send ans with explanation. plss no links. Q.7. The variance of 15 observations is 6. If each observation is increased by 8; find the variance of the resulting observations.

Subject: Maths, asked on 6/9/17

## ncert solutions of ch 15 by step deviation

Subject: Maths, asked on 9/8/17

## evaluate the following numbers: 5,6,4,6,8,4,2,8,6,5 Evaluate: (i)the mean (ii)the median (iii)the mode (iv)the range (v)the standard deviation

Subject: Maths, asked on 1/5/17

## Examples of less than cumulative frequency

Subject: Maths, asked on 16/3/17

## variance and standard deviation of 8,12,13,15,22,14

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