Question

① Consider the frequency distribution table given below which gives the weights of 38 students of a class Weight (in kg) 31 – 35 36 – 40 41 – 45 46 – 50 51 – 55 56 – 60 61 – 65

Number of students 9 5 14 3 2 1 4

1. Find the probability that the weight of a student in the class lies in the interval (46 - 50) kg.

2. Find the probability that weight of a student is more than 50 kg.​

Answer 1

Answer:

232kg in total - 122kg. Answer: 14: (i think) dont put this answer down me stuped

Step-by-step explanation:

Answer 2

Given :  frequency distribution table given below which gives the weights of 38 students of a class

Weight (in kg) 31 – 35 36 – 40 41 – 45 46 – 50 51 – 55 56 – 60 61 – 65

Number of students 9 5 14 3 2 1 4

To find :  the probability that the weight of a student in the class lies in the interval (46 - 50) kg.

2. probability that weight of a student is more than 50 kg.​

Solution:

Weight (in kg)     Number of students  

31 – 35                  9

36 – 40                  5

41 – 45                  14

46 – 50                  3

51 – 55                  2

56 – 60                  1

61 – 65                    4

Total                      38

46 – 50                  3

probability that the weight of a student in the class lies in the interval (46 - 50) kg.  =  3/38

more than 50 kg.​

51 – 55                  2

56 – 60                  1

61 – 65                    4

probability that weight of a student is more than 50 kg.​  = (2 + 1 + 4)/38

= 7/38

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