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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Mathematics
Chapter
Statistics

NTA Abhyas 2020 · Mathematics · Statistics

The average weight of students in a class of 35 students is 40kg ....

The average weight of students in a class of 3535 students is 40kg.40kg . If the weight of the teacher is included, then the average rises by 13kg.\dfrac{1}{3}kg .& The weight of the teacher is

Options

  1. A40.540.5 kg
  2. B5050 kg
  3. C4141 kg
  4. D5252 kg

Correct answer

D. 5252 kg

Step-by-step solution

Let, the weight of the teacher be wkg,wkg, then
40+13=35×40+w35+140 + \dfrac{1}{3} = \dfrac{35 \times 40 + w}{35 + 1}
⇒36×40+36×13=35×40+w⇒w=52⇒ 36 \times 40 + 36 \times \dfrac{1}{3} = 35 \times 40 + w ⇒ w = 52
∴∴ Weight of the teacher =52kg.= 52kg.
&
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