It just shows the difference between saturated and unsaturated solution; even though both solutions have the same amount of solvent which is 100 ml of water, they don't posses the same amount of solute (30g and 40g of salt) therefore, we can conclude that unsaturated solution has less amount of solute than the saturated one (vice versa).
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Answer:
It just shows the difference between saturated and unsaturated solution; even though both solutions have the same amount of solvent which is 100 ml of water, they don't posses the same amount of solute (30g and 40g of salt) therefore, we can conclude that unsaturated solution has less amount of solute than the saturated one (vice versa).