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By applying unitary method we can get,

Since daily earning of $5$ men $ = 700Rs.$

$\therefore $ Daily earning of $1$ man $ = \dfrac{{700}}{5} = 140Rs.$

$\therefore $ Daily earning of $7$ men $ = 140 \times 7$

$ = 840Rs.$ -------equation (1)

Similarly, for women

Since daily earning of $7$ women $ = 700Rs.$

$\therefore $ Daily earning of $1$ women $ = \dfrac{{700 \times 1}}{7}$

$ = 100Rs.$ ------equation (2)

On adding the equation (1) and equation (2),

Daily earning of $7$ men and $1$ women $ = 840 + 100 = 940Rs.$

Answer- $940Rs.$

1)Direct Variation- In this type, increase or decrease in one quantity will cause an increase or decrease in another quantity.

2)Inverse Variation- In this type, if we increase a quantity, then the value of another quantity gets decreased and vice-versa.

Any of these two can be used based on the problem asked