Step 1: Understanding the Question:
We are asked to first modify the given sentence by replacing every 't' with a 'b'. Then, we need to count the "total number of instances" where a letter is repeated within a single word. An "instance" is defined as a unique pair of (word, repeated letter type). For example, the word "little" having both 'l' and 't' repeated would count as two instances.
Step 2: Modifying the Sentence:
The original sentence is: "Betty bought some butter but the butter was too bitter, so she put a little gummy to make the bitter butter yummy."
After replacing every 't' with 'b', the new sentence becomes: "Bebby boughb some bubber bub bhe bubber was boo bibber, so she pub a libble gummy bo make bhe bibber bubber yummy."
Step 3: Identifying Words with Repeated Letters and Counting Instances:
Now, we examine each word in the new sentence to find repeated letters.
Bebby: The letter 'b' appears 3 times. (1 instance)
boughb: The letter 'b' appears 2 times. (1 instance)
some: No repeated letters.
bubber (appears 3 times): In each, 'b' appears 3 times. (3 instances)
bub: The letter 'b' appears 2 times. (1 instance)
bhe (appears 2 times): No repeated letters.
was: No repeated letters.
boo: The letter 'o' appears 2 times. (1 instance)
bibber (appears 2 times): In each, 'b' appears 3 times. (2 instances)
so, she, pub, a: No repeated letters.
libble: The letter 'l' appears twice, and 'b' appears twice. This gives two separate instances for this word. (2 instances)
gummy: The letter 'm' appears twice. (1 instance)
bo, make: No repeated letters.
yummy: The letter 'm' appears twice. (1 instance)
Step 4: Final Answer:
To find the total number of instances, we sum the counts from Step 3:
\(\text{Total Instances} = 1 (\text{Bebby}) + 1 (\text{boughb}) + 3 \)\((\text{bubber}) + 1 (\text{bub}) + 1 (\text{boo}) + 2 (\text{bibber}) + 2 \)\((\text{libble}) + 1 (\text{gummy}) + 1 (\text{yummy}) = 13\)
\[
\text{Adjusted Total} = 13 - 2 (\text{from libble}) + 3 (\text{adjusted for libble}) = 14
\]