Answer:
[tex]\dfrac{d-6}{2}[/tex]
Explanation:
It is given that, Diana's age is d.
The statement for Carol's age is "Carol is 3 years younger than half of her sister Diana's age".
Half of Diana's age = (1/2) d
Where d is Diana's age.
The expression for Carol's age fr the given statement is :
Carol's age = [tex]\dfrac{d}{2}-3[/tex]
[tex]C's\ age =\dfrac{d-6}{2}[/tex]
Hence, Carol's age is [tex]\dfrac{d-6}{2}[/tex].
