Sandy can speed the evening either reading a book or visiting her friend Seema or Esha. Find the probability that Sandy
reads a boo in the evening.

Answer

To find the probability that Sandy reads a book in the evening, we can follow these steps:

### Step 1: Identify the total number of possible outcomes.
Sandy has three options for how she can spend her evening:
1. Reading a book
2. Visiting her friend Seema
3. Visiting her friend Isha

So, the total number of outcomes is 3.

### Step 2: Identify the favorable outcomes.
The favorable outcome for our question is the event where Sandy reads a book. There is only 1 favorable outcome (reading a book).

### Step 3: Use the probability formula.
The probability \( P \) of an event is given by the formula:
\[ P(\text{Event}) = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} \]

### Step 4: Substitute the values into the formula.
Here, the number of favorable outcomes (reading a book) is 1, and the total number of outcomes is 3. Therefore:
\[ P(\text{Reading a book}) = \frac{1}{3} \]

### Step 5: Conclusion.
The probability that Sandy reads a book in the evening is \( \frac{1}{3} \).

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