RD Sharma Solutions Chapter 7 Statistics Exercise 7.1 Class 10 Maths
Chapter Name  RD Sharma Chapter 7 Statistics 
Book Name  RD Sharma Mathematics for Class 10 
Other Exercises 

Related Study  NCERT Solutions for Class 10 Maths 
Exercise 7.1 Solutions
x : 
5 
6 
7 
8 
9 
f : 
4 
8 
14 
11 
3 
Solution
x : 
19 
21 
23 
25 
27 
29 
31 
f: 
13 
15 
16 
18 
16 
15 
13 
Solution
x 
10 
15 
P 
25 
35 
f 
3 
10 
25 
7 
5 
x 
5 
10 
15 
20 
25 
f 
6 
P 
6 
10 
5 
x 
8 
12 
15 
P 
20 
25 
30 
f 
12 
16 
20 
24 
16 
8 
4 
6. Find the missing value of p for the following distribution whose mean is 12.58
x 
5 
8 
10 
12 
P 
20 
25 
f 
2 
5 
8 
22 
7 
4 
2 
x 
3 
5 
7 
9 
11 
13 
f 
6 
8 
15 
P 
8 
4 
8. Find the value of p, if the mean of the following distribution is 20.
x 
15 
17 
19 
20+p 
23 
f 
2 
3 
4 
5p 
6 
Calculate the mean age of the students.
Age(in years) 
15 
16 
17 
18 
19 
20 
No. of students: 
3 
8 
10 
10 
5 
4 
10. Candidates of four schools appear in a mathematics test. The data were as follows:
Schools 
No. of Candidates 
Average Score 
I 
60 
75 
II 
48 
80 
III 
NA 
55 
IV 
40 
50 
If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.
Solution
No. of heads per toss 
No. of tosses 
0 
38 
1 
144 
2 
342 
3 
287 
4 
164 
5 
25 
Total 
1000 
12. Find the missing frequencies in the following frequency distribution if it is known that the mean of the distribution is 50.
X 
10 
30 
50 
70 
90 
F 
17 
F_{1} 
32 
F_{2} 
19 
X_{i} 
5 
10 
15 
20 
25 
F_{i} 
7 
K 
8 
4 
5 
X_{i} 
5 
15 
25 
35 
45 
F_{i} 
3 
K 
3 
6 
2 
X_{i} 
10 
15 
P 
25 
30 
F_{i} 
5 
10 
7 
8 
2 