9. The mean (average) weight of three students is 40 kg. One of the st

1.	9. The mean (average) weight of three students is 40 kg. One of the students Ranga weighs46 kg. The other two students, Rahim and Reshma have the same weight. Find Rahimsweight.
Answer» Answer Given: Mean of three students = 40 kg The three students are Ranga, Rahim and Reshma, where Ranga’s weight = 46 kg Let Rahim’s weight = x And Reshma’s weight = y [∵Rahim’s weight = Reshma’s weight, according to the question] Mean is given by ∵Mean = 40] ⇒120 = 46 + 2x ⇒2x = 120 – 46 = 74 ⇒x = 74/2 ⇒x = 37 Thus, Rahim’s weight = 37 kg

9. The mean (average) weight of three students is 40 kg. One of the students Ranga weighs46 kg. The other two students, Rahim and Reshma have the same weight. Find Rahimsweight.

Answer»

Answer

Given: Mean of three students = 40 kg

The three students are Ranga, Rahim and Reshma, where

Ranga’s weight = 46 kg

Let Rahim’s weight = x

And Reshma’s weight = y [∵Rahim’s weight = Reshma’s weight, according to the question]

Mean is given by

∵Mean = 40]

⇒120 = 46 + 2x

⇒2x = 120 – 46 = 74

⇒x = 74/2

⇒x = 37

Thus, Rahim’s weight = 37 kg