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Introduction to Mathematical Modelling
Question
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Two coins are tossed ‘x’ number of times simultaneously. If the probability of having one head is 0.55, where it occurs 275 times, then the value of x is:
  • 15125
  • 500
  • 275
  • 0.45

Answer

B.

500

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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.