Advertisements
Advertisements
प्रश्न
The heights of 60 students of a class are given in the following table :
| Height(in cm) | 150-155 | 155-158 | 158-160 | 160-165 | 165-172 |
| No. of students | 8 | 20 | 25 | 4 | 3 |
Find the probability that the height of a student lies in the interval
(i) 155-158
उत्तर
The total number of students = 60
Total number of students whose height lie in the interval 155-158=20
P(Height of a student lies in the interval 155-158)
= `"Number of students whose height lies in the interval 155 -158 "/"Total number students"` = `20/60` = `1/3`
APPEARS IN
संबंधित प्रश्न
Sixteen cards are labelled as a, b, c, ............... m, n, o, p. They are put in a box and shuffled. A boy is asked to draw a card from the box. What is the probability that the card drawn is:
- a vowel.
- a consonant.
- none of the letters of the word median.
Cards bearing numbers 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 are kept in a bag. A card is drawn at random from the bag. Find the probability of getting a card which is:
1) a prime number
2) a number divisible by 4.
3) a number that is a multiple of 6.
4) an odd number.
Which of the following cannot be the probability of an event?
43%
A and B are friends. Ignoring the leap year, find the probability that both friends will have the same birthday?
A die is thrown once. The probability of getting a prime number is
There coins are tossed simultaneously . what is the probability of getting atleast two heads?
A perfect cubic die is thrown .Find the probability that
(i) an even number comes up
A coin is tossed twice . what is the probability of getting
(ii) atmost 1 tail
Two dice, one white and one red are rolled together .Find the probability of getting
(iii) a difference of 1
Two different coins are tossed simultaneously .Find the probability of getting :
(iii) atleast one tail
