Question

21 bricks have a mean mass of 24.2 kg, and 29 similar bricks have a mass of 23.6 kg.
Determine the mean mass of the 50 bricks.​

Answer 1

Answer:

lets do it in simple manner.

total mass of 21 bricks will be 21×24.2 kg

and total mass of 29 bricks will be 29×23.6 kg

so total mass of 21+29 bricks will be 21×24.2+29×23.6 kg

so average =total mass /total no. of bricks

=(21×24.2+29×23.6 )/50

solve this and you will get the answer