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There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom?
  • a)
    Between 10 and 32.
  • b)
    Between 14 and 32.
  • c)
    Between 10 and 18.
  • d)
    Between 14 and 18.
  • e)
    Between 18 and 36
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
There are 40 students in a classroom, 9/20 of them are boys and 4/5 of...
There are (9/20 x 40 = 18) boys in the class. 80% of them are right-handed, meaning that (4/5 x 18 = 14.4). Answer C is the best answer.
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Most Upvoted Answer
There are 40 students in a classroom, 9/20 of them are boys and 4/5 of...
Given information:
- Total number of students in the classroom = 40
- Proportion of boys = 9/20
- Proportion of right-handed students = 4/5

To find: Number of right-handed boys in the classroom

Solution:
1. Calculate the number of boys in the classroom:
- Proportion of boys = 9/20
- Number of boys = (9/20) * 40 = 18

2. Calculate the number of right-handed students in the classroom:
- Proportion of right-handed students = 4/5
- Number of right-handed students = (4/5) * 40 = 32

3. Determine the number of right-handed boys in the classroom:
- Number of right-handed boys = Number of boys * Proportion of right-handed students
- Number of right-handed boys = 18 * (4/5) = 14.4

4. Since the number of students must be a whole number, round down the decimal value:
- Rounded down number of right-handed boys = 14

Hence, the correct answer is option 'C': Between 10 and 18.
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There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom?a)Between 10 and 32.b)Between 14 and 32.c)Between 10 and 18.d)Between 14 and 18.e)Between 18 and 36Correct answer is option 'C'. Can you explain this answer? for GMAT 2025 is part of GMAT preparation. The Question and answers have been prepared according to the GMAT exam syllabus. Information about There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom?a)Between 10 and 32.b)Between 14 and 32.c)Between 10 and 18.d)Between 14 and 18.e)Between 18 and 36Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for GMAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There are 40 students in a classroom, 9/20 of them are boys and 4/5 of them are right-handed. How many right-handed boys are there in the classroom?a)Between 10 and 32.b)Between 14 and 32.c)Between 10 and 18.d)Between 14 and 18.e)Between 18 and 36Correct answer is option 'C'. Can you explain this answer?.
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