Question

The mean mass of four women is 60 kg. Another woman has a mass of 70 kg. Work out the mean mass of the five women. ​

Answer 1

Answer:

The mean mass of 5 women is 62 kg.

Step-by-step explanation:

Mean mass of 4 women = 60kg

we know mean = $\frac{Mass of observations}{Total number of observations}$

=> 60 = $\frac{Mass of observations}{4}$

=> Mass of observations = 60 * 4

                                         = 240

Total mass of 4 women = 240kg

Mass of 5th woman = 70 kg

Total mass of 5 women = 240kg + 70kg

                                        = 310kg

Mean mass of 5 women = $\frac{Mass of observations}{Total number of observations}$

Therefore the mean mass of 5 women = $\frac{310}{5}$ kg

                                         = 62 kg.

Answer 2

The mean mass of 5 women is 62 kg.

Step-by-step explanation:

Mean mass of 4 women = 60kg

we know mean =

=> 60

=

Massofobservations

Totalnumber of observations

Massofobservations

4

=> Mass of observations = 60 * 4

= 240

Total mass of 4 women = 240kg

Mass of 5th woman = 70 kg

Total mass of 5 women = 240kg + 70kg

= 310kg

Mean mass of 5 women =

Massofobservations Totalnumber of observations

Therefore the mean mass of 5 women = kg 310 5

= 62 kg.