The Statement 3: "There are exactly 30 more girls than boys". is absolutely true.
What is the unitary method?
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
The ratio of the number of boys to the number of girls at Liam's school is 4:5 and there are 270 students at his school.
4x + 5x = 270
9x = 270
x= 30
Then, Total boys = 4(30) = 120
Total girls = 5(30) = 150
We can see that Clearly, (Number of girls) > (Number of boys)
Difference = (Total girls) - (Total boys)
= 150-120
= 30
Hence, The Statement 3: "There are exactly 30 more girls than boys". is absolutely true.
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