An organisation selected families at random and surveyed them to determine a relationship between the income level and the number of vehicles in a family. The information gathered is listed in the table below:
Monthly income (In ₹)
Number of vehicles per family
0
1
2
3 or more
Less than ₹ 25000
10
160
25
0
₹ 25000- ₹ 30000
0
305
27
2
₹ 30000 - ₹ 35000
1
535
29
1
₹ 35000 - ₹ 40000
2
469
59
25
₹ 40000 or more
1
579
82
88
Suppose a family is chosen at random. If probability that the family chosen is earning per month and owning or more vehicles is , then find the value of .
Important Questions on Probability
An organisation selected families at random and surveyed them to determine a relationship between the income level and the number of vehicles in a family. The information gathered is listed in the table below:
| Monthly income (In ₹) | Number of vehicles per family | |||
| 0 | 1 | 2 | 3 or more | |
| Less than ₹ 25000 | 10 | 160 | 25 | 0 |
| ₹ 25000- ₹ 30000 | 0 | 305 | 27 | 2 |
| ₹ 30000 - ₹ 35000 | 1 | 535 | 29 | 1 |
| ₹ 35000 - ₹ 40000 | 2 | 469 | 59 | 25 |
| ₹ 40000 or more | 1 | 579 | 82 | 88 |
Suppose a family is chosen at random. Find the probability that the family chosen is owning not more than vehicle.
The table given below shows the marks obtained by students in a test.
| Marks (Class Interval) | |||||
| Number of students (Frequency) |
Out of these students, one is chosen at random. If the probability that the marks of the chosen student are or less is , then find the value of .
The table given below shows the marks obtained by students in a test.
| Marks (Class interval) | |||||
| Number of students (Frequency) |
Out of these students, one is chosen at random. What is the probability that the marks of the chosen student are or more?
The table given below shows the marks obtained by students in a test.
| Marks (Class interval) |
|||||
| Number of students (Frequency) |
Out of these students, one is chosen at random. What is the probability(in decimals) that his marks lie in the interval
The table given below shows the ages of teachers in a school.
| Age (in years) | ||||
| Number of teachers |
A teacher from this school is chosen at random. What is the probability that the selected teacher is or more than years old?
The table given below shows the ages of teachers in a school.
| Age (in years) | ||||
| Number of teachers |
A teacher from this school is chosen at random. If the probability that the selected teacher is of an age lying between years (including both) is , then find the value of .
The table given below shows the ages of teachers in a school.
| Age (in years) | ||||
| Number of teachers |
A teacher from this school is chosen at random. What is the probability that the selected teacher is years or more and years or less.
The table given below shows the ages of teachers in a school.
| Age (in years) | ||||
| Number of teachers |
A teacher from this school is chosen at random. What is the probability that the selected teacher is years or more old?
