Question

The following frequency distribution table gives the weight of 40 students of a class :(Weight (in kg) - Number of students)31— 35 - 936— 40 - 541— 45 - 1446— 50 - 351— 55 - 356— 60 - 261— 65 - 266— 70 - 171— 75 - 1Total - 40

(i) Find the probability that the weight of a student in the class lies in the interval 46 — 50 kg.(ii) What is the probability that the weight of a student is 30 kg ?(iii) What is the probability that the weight of a student is more than 30 kg ?

Answer 1

Answer:

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Answer 2

Answer:

1. $\frac{3}{40}$
2. 0
3. 1

Step-by-step explanation:

In this question

We have given that

31 -  35       9

36 - 40       10

41 -  45        14

46 - 50        3

51  - 55        3

56 -  60       2

61  -  65       2

66  - 70        1

71  -   75       1

Now we finding the probability

Probability that weight lies in the interval 46 - 50 = $\frac{3}{40}$

Probability that the weight of a student is 30kg =  $\frac{0}{40}$ = 0

Probability that weight of a student is more than 30kg = $\frac{40}{40}$ = 1