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A teacher of a class wants to set one question from each of two exercises in a book. If there are 15 and 12 questions in the two exercises respectively, then in how many ways can the two questions be selected?
  • a)
    160
  • b)
    140
  • c)
    180
  • d)
    120
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A teacher of a class wants to set one question from each of two exerc...
Since the first exercise contains 15 questions, the number of ways of choosing the first question In 15.
Since the second exercise contains 12 questions, the number of ways of choosing the second question is 12. Hence, by the fundamental principle, two questions can be selected in 15 x 12 = 180 ways.
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Most Upvoted Answer
A teacher of a class wants to set one question from each of two exerc...

Solution:

Combination of Questions:
To select one question from each exercise, we need to find the number of ways the two questions can be selected.

Number of Questions:
Exercise 1: 15 questions
Exercise 2: 12 questions

Number of Ways:
To select one question from each exercise, the number of ways can be calculated by multiplying the number of questions in each exercise.

Number of ways = 15 * 12
Number of ways = 180

Therefore, the two questions can be selected in 180 ways.

Hence, the correct answer is option C) 180.
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A teacher of a class wants to set one question from each of two exercises in a book. If there are 15 and 12 questions in the two exercises respectively, then in how many ways can the two questions be selected?a)160b)140c)180d)120Correct answer is option 'C'. Can you explain this answer?
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