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DIRECTIONS: Choose the most appropriate answer:
Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.
- a)50 kg
- b)50.8 kg
- c)49 kg
- d)49.9 kg
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
DIRECTIONS: Choose the most appropriate answer:Q. The average weight o...
Let the weight of the boy who left the class is x.
Total weight = 50 × 45 = 2250 kg
when one boy left the class total weight is (2250 – x)
and no. of student left is 49.
According to question –
Total weight = 50 × 45 = 2250 kg
when one boy left the class total weight is (2250 – x)
and no. of student left is 49.
According to question –
Most Upvoted Answer
DIRECTIONS: Choose the most appropriate answer:Q. The average weight o...
Explanation:
To solve this problem, we need to use the concept of averages. Let's break down the information given:
- The average weight of 50 boys in a class is 45 kg.
- When one boy leaves the class, the average reduces by 100g.
Step 1: Calculate the total weight of the 50 boys:
The average weight of the 50 boys is given as 45 kg. We can find the total weight of the 50 boys by multiplying the average weight by the number of boys:
Total weight of 50 boys = Average weight * Number of boys
Total weight of 50 boys = 45 kg * 50 boys = 2250 kg
Step 2: Calculate the total weight of the 49 boys:
When one boy leaves the class, the average weight reduces by 100g. This means that the total weight of the remaining 49 boys is 100g less than the total weight of the original 50 boys.
Total weight of 49 boys = Total weight of 50 boys - 100g
Total weight of 49 boys = 2250 kg - 0.1 kg (since 1 kg = 1000g)
Total weight of 49 boys = 2249.9 kg
Step 3: Calculate the weight of the boy who left the class:
To find the weight of the boy who left the class, we need to subtract the total weight of the 49 boys from the total weight of the 50 boys.
Weight of the boy who left the class = Total weight of 50 boys - Total weight of 49 boys
Weight of the boy who left the class = 2250 kg - 2249.9 kg
Weight of the boy who left the class = 0.1 kg
Therefore, the weight of the boy who left the class is 0.1 kg, which is equivalent to 100g. Hence, the correct answer is option 'D' - 49.9 kg.
To solve this problem, we need to use the concept of averages. Let's break down the information given:
- The average weight of 50 boys in a class is 45 kg.
- When one boy leaves the class, the average reduces by 100g.
Step 1: Calculate the total weight of the 50 boys:
The average weight of the 50 boys is given as 45 kg. We can find the total weight of the 50 boys by multiplying the average weight by the number of boys:
Total weight of 50 boys = Average weight * Number of boys
Total weight of 50 boys = 45 kg * 50 boys = 2250 kg
Step 2: Calculate the total weight of the 49 boys:
When one boy leaves the class, the average weight reduces by 100g. This means that the total weight of the remaining 49 boys is 100g less than the total weight of the original 50 boys.
Total weight of 49 boys = Total weight of 50 boys - 100g
Total weight of 49 boys = 2250 kg - 0.1 kg (since 1 kg = 1000g)
Total weight of 49 boys = 2249.9 kg
Step 3: Calculate the weight of the boy who left the class:
To find the weight of the boy who left the class, we need to subtract the total weight of the 49 boys from the total weight of the 50 boys.
Weight of the boy who left the class = Total weight of 50 boys - Total weight of 49 boys
Weight of the boy who left the class = 2250 kg - 2249.9 kg
Weight of the boy who left the class = 0.1 kg
Therefore, the weight of the boy who left the class is 0.1 kg, which is equivalent to 100g. Hence, the correct answer is option 'D' - 49.9 kg.
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DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer?
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DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer?.
DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer?.
Solutions for DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Defence.
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DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of DIRECTIONS: Choose the most appropriate answer:Q. The average weight of 50 boys in a class is 45 kg. When one boy leaves the class, the average reduces by 100g. Find the weight of the boy who left the class.a)50 kgb)50.8 kgc)49 kgd)49.9 kgCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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