Answer:
1/2
Explanation:
You want the experimental probability that the next cookie sold will be heart-shaped when Nate's sales so far are the shapes ...
- diamond: 5
- heart: 45
- tree: 2
- cat: 38
Experimental probability
An experimental probability is a statement of the ratio of the outcome of interest to all of the outcomes experienced.
Nate has sold 5+45+2+38 = 90 cookies. Of these, 45 are heart-shaped, so the fraction of all cookies that are heart-shaped is 45/90 = 1/2.
Nate can expect that the next cookie sold will be heart-shaped with probability 1/2.