Question

The average weight of 22 boys out of 32 is 25 kg and that of the remaining 10 boys is 28.2 kg. Find the average weight of all the students.​

Answer 1

Answer:

Average weight of all students = 26 kg

Step-by-step explanation:

Given weight of 22 boys = 25

 total weight of 22 boys = 25 × 22 = 550 kg   [average =  $\frac{total weight }{number of boys}$ ]

  remaining boys = 10

  average weight of 10 boys = 28.2 kg

 total weight of 10 boys = 28.2 × 10 = 282 kg

 total number of boys = 22+ 10 =32

 total weight of 32 boys = 22 boys weight + 10 boys weight

                                        = 550 + 282 = 832 kg

      average weight of all students = [ $\frac{total weight }{number of boys}$ ]  

                                                       832 / 32 =26 kg