
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
For a household telephone, the probability that an incoming call is answered at the first ring is $\frac{1}{10}$, at the second ring is $\frac{3}{10}$, at the third ring is $\frac{2}{5}$, and at the fourth ring is $\frac{1}{10}$. Determine the probability that the phone call is answered within the first four rings.

Present the answer in LaTex format: \boxed{Your answer}
user