Today is SEWA period day. Different activities are performed by the students
according to their choice. Three topics were given 'Swachch Bharat', 'Swasth Bharat
and 'Plastic Mukt Bharat'. Three students have to give their presentations. Teacher
told the students that out of 17 cards one card will be drawn and the student of
that roll number will give the presentation. To be fair cards numbered 1, 2, 3, ......17
are put in a box and mixed thoroughly. One card is drawn from the box.
i) How many possible outcomes are there?
ii) What are the favourable outcomes for a prime number?
iii) What is the probability that a student with composite number will give the
presentation?
Answers
Answered by
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9/17 is probability that a student with composite roll number will give the presentation
Step-by-step explanation:
Numbers are from
1 to 17
Total Numbers 17
possible outcomes are 17
2 , 3 , 5 , 7 , 11 , 13 , 17 - are prime numbers
7 Prime numbers
favorable outcomes for a prime number = 7
Probability = 7/17
Composite numbers -
a positive integer that has at least one divisor other than 1 and itself
4, 6, 8, 9, 10, 12, 14, 15, 16 - Hence 9 Composite numbers
probability that a student with composite roll number will give the presentation = 9/17
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