The mean of 50 numbers is 18, the new mean will be …. if each observation is increased by 4 ( 22/24/20)

Hide | ShowAnswer :

24

The sum of deviations of a set of values {a,b,c,d,e,f,g.h.i……} n items measured from 26 is -10 and the sum of deviations of the values from 20 is 50. The value of n is …(10/12/9) And mean of the items is ……. ( 19/18/17/25)

Hide | ShowAnswer :

25

For a given data with 110 observations the ‘less than ogive’ and the ‘more then ogive’ intersect at (18, 20). The median of the data is …… (18/20/19)

Hide | ShowAnswer :

18

The curve drawn by taking upper limits along x-axis and cumulative frequency along y-axis is ……….( less than ogive /more than ogive)

Hide | ShowAnswer :

less than ogive curve

The mean of five numbers is 40. If one number is excluded, their mean becomes 28. The excluded number is……. (68 / 88)

Hide | ShowAnswer :

88

While computing mean of grouped data, we assume that the frequencies are centred at the ____________ of the classes

Hide | Show

Answer :

class-marks

For drawing a frequency polygon of a continuous frequency distribution, we plot the Points whose ordinates are the frequencies of the respective classes and abscissae are respectively :** **

Answer :

class marks of the classes

Find the mean of 32 numbers given mean of ten of them is 12 and the mean of other 20 is 9. And last 2 number is 10

Hide | ShowAnswer :

10

The median and mean of the first 10 natural numbers.

Hide | ShowAnswer :

5.5,5.5

Anand says that the median of 3, 14, 19, 20, 11 is 19. What doesn’t the Anand understand about finding the median?

Hide | ShowAnswer :

The dataset should be ascending order

Find the mean of the following data. (2012)

Class |
Frequency |

Less than 20 |
15 |

Less than 40 |
37 |

Less than 60 |
74 |

Less than 80 |
99 |

Less than 100 |
120 |

Answer :

= 52.5

The following table gives the literacy rate (in %) in 40 cities. Find the mean literacy rate: (2012)

Literacy rate |
No. of cities |

45 – 55 |
4 |

55 – 65 |
11 |

65 – 75 |
12 |

75 – 85 |
9 |

85 – 95 |
4 |

Answer :

The frequency distribution table of agricultural holdings in a village is given below: (2013)

Area |
No. of families |

1 – 3 |
25 |

4 – 6 |
22 |

7 – 9 |
52 |

10 – 12 |
45 |

13 – 15 |
16 |

Find the Mean area held by a family.

Answer :

=8.09

The mean of the following frequency distribution is 62.8. Find the missing frequency x. (2013)

Class |
Frequency |

0 – 20 |
5 |

20 – 40 |
8 |

40 – 60 |
X |

60 – 80 |
12 |

80 – 100 |
17 |

100 – 120 |
8 |

Hide | Show

Answer :

x=10

If the mean of the following distribution is 50, find the value of p: (2013)

Class |
Frequency |

0 – 20 |
17 |

20 – 40 |
P |

40 – 60 |
32 |

60 – 80 |
24 |

80 – 100 |
19 |

Answer :

p=28

4 , 10 , 7 , 7 , 6 , 9 , 3 , 8 , 9

1 |
Mode |
A |
7 |

2 |
Mean |
B |
7 & 9 |

3 |
Sample standard deviation |
C |
2.35 |

Answer :

1-B, 2-A, 3-C

62 , 65 , 68 , 70 , 72 , 74 , 76 , 78 , 80 , 82 , 96 , 101

1 |
third quartile |
A |
69 |

2 |
Median |
B |
81 |

3 |
first quartile |
C |
75 |

Answer :

1-B, 2-C, 3-A,

Answer :

1-B, 2-C, 3-D, 4-A

Answer :

1-D, 2-C, 3-B, 4-A

Answer :

1-B, 2-C, 3-A

The world is highly data-oriented, in fact, each and every field has a group of data, which represents the relevant information. Statistics is the branch of mathematics which deals with the representation of data in a meaningful way.

You will face many real-life scenarios where the fundamentals of statistics are used to represent a set of data in tabular form or in graphs or in pie charts. There are a number of methods you will learn from this chapter such as, step deviation methods, finding mode and median of grouped data, converting frequency distribution and the relation between mode, mean and median methods, etc.

- Science Book for CBSE Class 10
- Maths Book for CBSE Class 10
- English Book for CBSE Class 10
- Social Science Book for CBSE Class 10
- Hindi Book for CBSE Class 10
- Gujarati Book for CBSE Class 10

The GSEB Books for class 10 are designed as per the syllabus followed Gujarat Secondary and Higher Secondary Education Board provides key detailed, and a through solutions to all the questions relating to the GSEB textbooks.

The purpose is to provide help to the students with their homework, preparing for the examinations and personal learning. These books are very helpful for the preparation of examination.

For more details about the GSEB books for Class 10, you can access the PDF which is as in the above given links for the same.