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Let's break down the problem:

The bar graph shows the following distribution of coins in the piggy bank:
- Pennies: 21
- Nickels: 7
- Dimes: 17
- Quarters: 30

### Total coins:
\[
21 \text{ (pennies)} + 7 \text{ (nickels)} + 17 \text{ (dimes)} + 30 \text{ (quarters)} = 75 \text{ coins in total}
\]

### 1. Probability that the coin is a penny:
\[
\text{Probability} = \frac{\text{Number of pennies}}{\text{Total coins}} = \frac{21}{75} \approx 0.28
\]

### 2. Probability that the coin is a dime:
\[
\text{Probability} = \frac{\text{Number of dimes}}{\text{Total coins}} = \frac{17}{75} \approx 0.23
\]

### 3. Probability that the coin is **not** a nickel:
\[
\text{Probability} = 1 - \frac{\text{Number of nickels}}{\text{Total coins}} = 1 - \frac{7}{75} = \frac

Suppose a coin is selected at random from the piggy bank. Write the answer as a decimal rounded to 2 decimal places.
1. What is the probability that the coin is a penny?
2. What is the probability that the coin is a dime?
3. What is the probability that the coin is not a nickel?

This problem involves finding the probability of selecting specific coins from a piggy bank with 21 pennies, 7 nickels, 17 dimes, and 30 quarters. Learn how to calculate probabilities and complement rules in probability. Suitable for Grades 5-7.

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