Call me

Have a Query? We will call you right away.

+91

E.g: 9876543210, 01112345678

We will give you a call shortly, Thank You

Office hours: 9:00 am to 9:00 pm IST (7 days a week)

What are you looking for?

Syllabus

6. Find the median weight for the following data:

A sum exceeding 12

A doublet

Sum of two numbers as an even number

Q7. The mean of 5 numbers is 20. If one number is excluded, mean of the remaining numbers becomes 23. Find the excluded number.

Q8. The mean of 25 observations is 27. If one observation is included, the mean still remains 27. Find the included observation.

Q9. The mean of 5 observations is 15. If the mean of first three observations is 14 and that of the last three is 17, find the third observation.

-Repeating the question:-

"Answer the ICSE board question(2018).

CHAPTER :STATISTICS

(b) If the mean of he following distribution is 24 , find the value of

'a'

$\begin{array}{cccccc}Marks& 0-10& 10-20& 20-30& 30-40& 40-50\\ NumberofStudents& 7& a& 8& 10& 5\end{array}\phantom{\rule{0ex}{0ex}}$

1) the value of x;

2) the mean of first three observations.

Q(a). The ogive of the distribution of marks of 45 students is given below. Find mean by using step deviation method.

(b) The daily expenditure of 100 families are as follows :

_{1}_{2}_{3}Daily mean expenditure per family is Rs. 188. Find f

_{1}and f_{2}.(c) Calculate mean, median and mode of the following distribution :

Draw a cumulative frequency table.

An ace

The 10 hearts

A black card

Find the mean lifetime of electricity tubes.

1.variable 2.class size 3.class mark 4.class limits 5.true class limits 6.frequency of a class.

7.cummulative frequency of a class.

[Hint: The exports of three companies to five countries in the year 1993-96]

A B C

A B C

A B C

A B C

2. U.S. A.

3 France

4. Germany

5 China