Please select a subject first
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Find the mean deviation about the mean for the data.
| Height in cms | Number of boys |
| 95 - 105 | 9 |
| 105 - 115 | 13 |
| 115 - 125 | 26 |
| 125 - 135 | 30 |
| 135 - 145 | 12 |
| 145 - 155 | 10 |
Concept: undefined >> undefined
Find the mean deviation about median for the following data:
| Marks | Number of girls |
| 0-10 | 6 |
| 10-20 | 8 |
| 20-30 | 14 |
| 30-40 | 16 |
| 40-50 | 4 |
| 50-60 | 2 |
Concept: undefined >> undefined
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Calculate the mean deviation about median age for the age distribution of 100 persons given below:
| Age | Number |
| 16 - 20 | 5 |
| 21 - 25 | 6 |
| 26 - 30 | 12 |
| 31 - 35 | 14 |
| 36 - 40 | 26 |
| 41 - 45 | 12 |
| 46 - 50 | 16 |
| 51 - 55 | 9 |
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
Set of concentric circles in a plane
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
Set of letters of the English Alphabets
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
{x ∈ N : x > 5}
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
{x = ∈ N : x < 200}
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
{x ∈ Z : x < 5};
Concept: undefined >> undefined
Which of the following sets are finite and which are infinite?
{x ∈ R : 0 < x < 1}.
Concept: undefined >> undefined
Compute:
(i)\[\frac{30!}{28!}\]
Concept: undefined >> undefined
Compute:
Concept: undefined >> undefined
Compute:
L.C.M. (6!, 7!, 8!)
Concept: undefined >> undefined
Prove that
Concept: undefined >> undefined
Which of the following statements are true? Give reason to support your answer.
(i) For any two sets A and B either \[A \subseteq B o\text{ or } B \subseteq A;\]
Concept: undefined >> undefined
In a class there are 27 boys and 14 girls. The teacher wants to select 1 boy and 1 girl to represent the class in a function. In how many ways can the teacher make this selection?
Concept: undefined >> undefined
Which of the following statements are true? Give reason to support your answer.
Every subset of an infinite set is infinite
Concept: undefined >> undefined
A person wants to buy one fountain pen, one ball pen and one pencil from a stationery shop. If there are 10 fountain pen varieties, 12 ball pen varieties and 5 pencil varieties, in how many ways can he select these articles?
Concept: undefined >> undefined
Which of the following statements are true? Give reason to support your answer.
Every subset of a finite set is finite
Concept: undefined >> undefined
From Goa to Bombay there are two roots; air, and sea. From Bombay to Delhi there are three routes; air, rail and road. From Goa to Delhi via Bombay, how many kinds of routes are there?
Concept: undefined >> undefined
Which of the following statements are true? Give reason to support your answer.
Every set has a proper subset
Concept: undefined >> undefined
