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
A number is chosen at random from the number –3, –2, –1, 0, 1, 2, 3. What will be the probability that square of this number is less then or equal to 1?
Two different dice are thrown together. Find the probability that the numbers obtained have a sum less than 7
A book contains 85 pages. A page is chosen at random. What is the probability that the sum of the digits on the page is 8?
Two dice are rolled together. Find the probability of getting a total of at least 10.
A bag contains 16 coloured balls. Six are green, 7 are red and 3 are white. A ball is chosen, without looking into the bag. Find the probability that the ball chosen is green or red.
A coin is tossed twice . what is the probability of getting
(i) no head
Two different coins are tossed simultaneously .Find the probability of getting :
(ii)no tail
Two different dice are thrown at the same time. Find the probability of getting :
(ii)sum divisible by 5
Two different dice are thrown at the same time. Find the probability of getting :
(iii) a sum of at least 11
Which of the following cannot be the probability of an event?
