<u>Answer-</u>
<em>She has 11 number of 52 cent stamps and 17 number of 34 cent stamps.</em>
<u>Solution-</u>
Given that, Sally has six more 34 cent stamps as compared to 52 cent stamps.
Let us assume, she has x number of 52 cent stamps and then the number of 34 cent stamps will be x+6
Then, the worth of her stamps will be,

Given the fact that, her stamps amount to 11.50





Therefore, she has 11 number of 52 cent stamps and 17 number of 34 cent stamps.