The average weight of 39 students is 30 kg. By the admission of a new student, the average comes down to 29.8 kg. Find the weigth of the new student.

The average weight of 39 students is 30 kg. By the admission of a new student, the average comes down to 29.8 kg. Find the weigth of the new student. ?

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

22 kg

22.6 kg

31 kg

29.8 kg

0 1

Best Answer Explained in Below-:

Let, the sum of 39 students' age = a, And the weight of the new student = b So, \(a^{39}\) = 30 ⸫ a = 39 × 30 And, a + \(b^{40}\) = 29.8 ⇒ a + b = 29.8 × 40 ⇒ b = 29.8 × 40 - a = 29.8 × 40 - 39 × 30 = 22 kg

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Find the value of a if 27a=15b and 3a=5b

Three consecutive eveb numbers are such that if the first is divided by 6, the second by 4 and the third by 7, the sum of the quotients is 38. Find the numbers.

The average weight of 39 students is 30 kg. By the admission of a new student, the average comes down to 29.8 kg. Find the weigth of the new student. ?

Find the value of a if 27a=15b and 3a=5b

Three consecutive eveb numbers are such that if the first is divided by 6, the second by 4 and the third by 7, the sum of the quotients is 38. Find the numbers.

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