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Introduction To Mathematical Modelling

Question
CBSEENMA9003998
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In Q.5, Exercise 14.2, you were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12 - 0.16 on any of these days

Solution

Total number of days = 30

Number of days on which the concentration of sulphur dioxide is in the interval 0.12 – 0.16 = 2.

∴ Probability that the concentration of sulphur dioxide is in the interval 0.12–0.16 on any of   these days equals 2 over 30 equals 1 over 15

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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