Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

The mean of 25 observations is 36. If the mean of the first 13 observations is 32 and that of last 13 observations is 39. Find the 13th observation.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Sum of first 13 observations = 13 32 = 416

Sum of last 13 observations = 13 39 = 507

Sum of all 25 observations = 25 36 = 900

The 13th observation = 416 + 507 - 900 = 23

13th observation = 23

Answered by | 04 Jun, 2014, 03:23: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Maths
Observations of a raw data are 5,28,15,10,24. Add four more numbers so that mean and median of the data remain the same, but mode increases by 1.
Asked by 16presa1186 | 09 Jan, 2023, 07:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
The most occurring frequency observation from data is called........ 
Asked by Princevekariaya | 04 Apr, 2021, 01:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95
Asked by swatipuspapatel | 12 Jan, 2021, 07:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
find a new mean if 2,4 is added and 5 is subtracted from data of mean 20 and terms 100
Asked by tapiawalabipin | 09 Jan, 2020, 08:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
how to find mean , median , mode
Asked by anish.ravesh | 07 Jul, 2019, 12:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
If class mark is 10 and class width is 6 then find the class  
Asked by Vvirattiger2003 | 02 Apr, 2019, 04:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
For what value of x, is the mode of the following data 17?15,16,17,13,17,16,14,x,17,16,15,15
Asked by Topperlearning User | 18 Aug, 2017, 01:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by Topperlearning User | 18 Aug, 2017, 02:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
The mean of 68 numbers is 18. If each number is divided by 6, find the new mean. Find the relation between the new mean and the old mean.
Asked by Topperlearning User | 18 Aug, 2017, 01:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×