NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Advait.n
Subject: Maths
, asked on 17/12/17
7. The mean of the following distribution is 50.
x
f
10
30
50
70
90
17
5a + 3
32
7a - 11
19
Find the value of a hence the frequencies of 30 and 70.
Answer
6
Manvi Garg
Subject: Maths
, asked on 9/12/17
Plz answer 32,33and 34th queztionas fast as possible
Q32. Find missing frequencies if mean = 1.46 & sum of frequencies : 200
x
0
1
2
3
4
5
f
46
x
y
25
10
5
Q33. Find missing frequencies if Mean = 50.
$\sum _{}$
f
i = 120
C.I.
0-20
20-40
40-60
60-80
80-100
f i
17
28
x
24
y
Q34. Find missing frequencies if mean = 54 &
$\sum _{}$
f
=50
CI
0- 20
20-40
40-60
60-80
80-100
fi
7
x
10
Y
13
Answer
1
Devesh Kumar Biswal
Subject: Maths
, asked on 8/12/17
Please slove question 28
Q.28. Draw the frequency polygon without constructing the histogram of the following observations.
Answer
1
Devesh Kumar Biswal
Subject: Maths
, asked on 8/12/17
Q.22. Three coins are tossed simultaneously 60 times, with the following frequencies 3 heads : 10 times, 2 heads : 5 times, 1 head : 18 times, no head : 27 times. Find P(getting 3 heads) + P(getting no head).
Answer
1
Devesh Kumar Biswal
Subject: Maths
, asked on 8/12/17
Please slove question 19
Q.19. Following table gives the distribution of time taken to solve a problem by 40 students.
Draw a histogram to represent the above data.
Answer
2
Devesh Kumar Biswal
Subject: Maths
, asked on 8/12/17
Please solve question 3
Q.3. If the class mark and class size of a class are 6 and 7 respectively, then find the upper limit of the class.
Answer
2
Varad Joshi
Subject: Maths
, asked on 3/12/17
find the missing frequency if mean is 20.6 x=10 15 20 25 35 f= 3 10 9 7 5
Answer
1
Anushka Mishra
Subject: Maths
, asked on 1/12/17
The mean of 20 observations is 17. If 25 is added to the sum of observations, find the new mean.
Answer
2
Scarlett
Subject: Maths
, asked on 19/11/17
Find the median when x is 7 , 30 , 50 , 70 , 89 and f is 7, 8 , 10 , 15 , 10 here f is frequency and x is observation
Answer
1
Srishti Sinha
Subject: Maths
, asked on 14/11/17
When we use tally marks in the questions related to statistics?In some questions tally marks are used and in other some questions,tally marks are not used.Why?
Answer
1
Sumit Kumar Jha
Subject: Maths
, asked on 21/10/17
What is the formula to find median of Even number of Observations?
Answer
2
Sumit Kumar Jha
Subject: Maths
, asked on 21/10/17
The average of 2,7,6 and x is 5 and the average of 18,16,x and y is 10. Find the value of y and x.
Answer
2
G.a.harini
Subject: Maths
, asked on 8/10/17
14th one please
14.
Consider a small unit of factory where there are 5 employees : a supervisor and four labourers. The labours draw a salary of Rs.5000 per month each while the supervisor gets Rs.15,000 per month. Calculate the mean, median and mode of the salaries of this unit of the factory:
5000, 5000, 5000, 5000, 15000.
Answer
2
Bhoomika
Subject: Maths
, asked on 2/10/17
three houses K,B and C are in a line. there are five houses between K and B and eight houses between B and C. if there be three houses left of C and 21 houses right of K, what could be the minimum number of houses in the line. plz answer!! fast!!
Answer
3
Gagandeep Singh
Subject: Maths
, asked on 6/9/17
Please answer.
Q.
The pass percentage in different subjects and the no.of students who appeared in the subjects are given below :
Find the arithmetic mean of pass percentage and the
weighted arithmetic mean.
Answer
1
Prev
1
2
3
4
5
Next
What are you looking for?

30

50

70

90

5a + 3

32

7a - 11

19

Q32. Find missing frequencies if mean = 1.46 & sum of frequencies : 200

Q33. Find missing frequencies if Mean = 50. $\sum _{}$

fi = 120Q34. Find missing frequencies if mean = 54 &$\sum _{}$

f=50Q.28. Draw the frequency polygon without constructing the histogram of the following observations.

Q.19. Following table gives the distribution of time taken to solve a problem by 40 students.

Draw a histogram to represent the above data.

Q.3. If the class mark and class size of a class are 6 and 7 respectively, then find the upper limit of the class.

14.Consider a small unit of factory where there are 5 employees : a supervisor and four labourers. The labours draw a salary of Rs.5000 per month each while the supervisor gets Rs.15,000 per month. Calculate the mean, median and mode of the salaries of this unit of the factory:5000, 5000, 5000, 5000, 15000.

Q.The pass percentage in different subjects and the no.of students who appeared in the subjects are given below : Find the arithmetic mean of pass percentage and theweighted arithmetic mean.