[tex]Mean\;Mass\;of\;Four\;Women = \frac{Sum\;of\;Masses\;of\;Four\;Women}{4}[/tex]
Given Mean Mass of Four Women = 60
[tex]\implies \frac{Sum\;of\;Masses\;of\;Four\;Women}{4} = 60\\ \\\implies Sum\;of\;Masses\;of\;Four\;Women = 60\times4 = 240[/tex]
Given the Mass of Fifth Woman = 70 kg
[tex]Mean\;Mass\;of\;Five\;Women = \frac{(Sum\;of\;Masses\;of\;Four\;Women) + (Mass\;of\;Fifth\;Woman)}{5}[/tex]
[tex]\implies Mean\;Mass\;of\;Five\;Women = \frac{240 + 70}{5} = \frac{310}{5} = 62\;Kg[/tex]
