How many 3's are there in the following seque | vedclass

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(B) We need to find the number of $3$'s that satisfy two conditions: $1$. It is not preceded by $6$ (i.e.,the digit before $3$ is not $6$). $2$. It is

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(B) We need to find the number of $3$'s that satisfy two conditions: $1$. It is not preceded by $6$ (i.e.,the digit before $3$ is not $6$). $2$. It is not followed by $9$ (i.e.,the digit after $3$ is not $9$). Let's analyze the sequence: $9, 3, 6, 6, 3, 9, 5, 9, 3, 7, 8, 9, 1, 3, 9, 6, 3, 9$ - The first $3$ is preceded by $9$ and followed by $6$. (Condition satisfied: $9, 3, 6$) - The second $3$ is preceded by $6$ and followed by $9$. (Condition not satisfied) - The third $3$ is preceded by $9$ and followed by $7$. (Condition satisfied: $9, 3, 7$) - The fourth $3$ is preceded by $1$ and followed by $9$. (Condition not satisfied) - The fifth $3$ is preceded by $6$ and followed by $9$. (Condition not satisfied) Thus,there are $2$ such $3$'s that satisfy the given conditions.

How many $3$'s are there in the following sequence which are neither preceded by $6$ nor immediately followed by $9$?
$9, 3, 6, 6, 3, 9, 5, 9, 3, 7, 8, 9, 1, 3, 9, 6, 3, 9$

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How many $3$'s are there in the following sequence which are neither preceded by $6$ nor immediately followed by $9$?$9, 3, 6, 6, 3, 9, 5, 9, 3, 7, 8, 9, 1, 3, 9, 6, 3, 9$