Question

the mean weight of 60 student of a class is 52.75 kg the mean weight of 25 student of this class is 51 kg find the mean weight of the remaining certified students of the class

Answer 1

Let x be the avg weight of rest 35 students
So 52.75=(51*25 + x*35)/60
X= [(52.75*60)-(51*25)]/35
=54

Answer 2

Answer:

$\huge\mathbb\red{Required \: answer}$$\large\red\implies\star{}$

Solution⇨★

⇨★Total weight of 60 students = 60 × 52.75 kg = 3165 kg

⇨★Total weight of 25 students = 25 × 51 kg = 1275 kg

∴ Total weight of 35 students = (3165 – 1275) kg = 1890 kg

∴ Mean, weight of 35 students = 1890/35 = 54 kg

$\huge\boxed{\fcolorbox{blue}{orange}{hope it helps}}$