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Introduction To Mathematical Modelling

Question

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The weights of 60 persons in a group are given below:

Weight (in kg)

No. of persons

60

5

61

18

62

4

63

16

64

5

65

12

Find the probability that a person selected at random has

(a) weight less than 70 kg
(b) weight between 61 and 64 kgs
(c) weight equal to more than 64 kg

Solution

Solution not provided.
Ans. (a) 1 (b) $1 third$ (c) $17 over 60$

Some More Questions From Introduction to Mathematical Modelling Chapter

Activity: Note the frequency of two wheelers, three wheelers and four wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

Activity: Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3 ? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

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