Question

Following frequency distribution gives the weights of 38 students of a class

Weight Number of students

(in kg)

31 – 35 9

36 – 40 5

41 – 45 14

46 – 50 3

51 – 55 1

56 – 60 2

61 – 65 2

66 – 70 1

71 – 75 1

Find the probability that weight of a student in the class is:

(i) At most 60 kg (ii) at least 36 kg (iii) not more than 50 kg​

Answer 1

Answer:

Following frequency distribution gives the weights of 38 students of a class

Weight Number of students

(in kg)

31 – 35 9

36 – 40 5

41 – 45 14

46 – 50 3

51 – 55 1

56 – 60 2

61 – 65 2

66 – 70 1

71 – 75 1

Find the probability that weight of a student in the class is:

(i) At most 60 kg (ii) at least 36 kg (iii) not more than 50 kg

Explanation:

1). 17/19

2). 29/38

3). 31/38