natalie has a change purse full of coins. she has 13 pennies, 15 dimes and 22 nickles. if she takes a coins out of her purse, without looking, the probability that it will be a penny is ----------- out of ------------
To find the probability of drawing a penny from Natalie's change purse, we need to determine the total number of coins in her purse and the number of pennies.
According to the information given, Natalie has:
- 13 pennies
- 15 dimes
- 22 nickels
The total number of coins in her purse is the sum of these quantities:
Total number of coins = 13 pennies + 15 dimes + 22 nickels
Now we can calculate the probability of drawing a penny:
Probability of drawing a penny = Number of pennies / Total number of coins
To get the answer, substitute the respective values:
Probability of drawing a penny = 13 pennies / (13 pennies + 15 dimes + 22 nickels)
Simplifying the expression, you can calculate the probability as follows:
Probability of drawing a penny = 13 / (13 + 15 + 22)
Or, Probability of drawing a penny ≈ 13 / 50
Therefore, the probability that Natalie will draw a penny is 13 out of 50.
she has sum = 13 + 15 + 22 coins
so
13/sum