Question

In a class of 45 students, 30 are boys and remaining are girls. If the mean weight of girls is 45 kg and that of boys is 52 kg, then the mean weight of entire class (in kg) is nearest to

Answer 1

no of girls= 45-30=15

weight of girl =15 x 45= 675 kg

weight of boys = 30 x 52= 1560 kg

entire class weight= weight of girl+ weight of boys

entire class weight= 2235 kg