Question

The mean weight of 4 members of a family is 60kg.Three of them have the weight 56kg ,68kg,72kg respectively .Find the weight of the fourth member.

Answer 1

Answer:44 kg

Step-by-step explanation:

Let the weight of the 4th person =X kg

A|Q,

56/4+68/4+72/4+X/4=60

=>196X=60×4

=>X=240-196

=>X=44 kg

Answer 2

Given :

The mean weight of 4 members of a family is 60kg.Three of them have the weight 56kg ,68kg,72kg respectively

To Find:

Find the weight of the fourth member.

Solution:

Let the weight of fourth member be x

The mean weight of 4 members of a family is 60kg.

Three of them have the weight 56kg ,68kg,72kg respectively

$Average = \frac{\text{Sum of all observations}}{\text{No. of observations}}$

$60 = \frac{56+68+72+x}{4}\\60 \times 4 =56+68+72+x$

240=196+x

240-196=x

44=x

Hence The weight of fourth member is 44 kg