Fraction Problem: Finding Combined 1/5 and 1/3 of 15 Balls

Video Solution

Solution Steps

00:00 Find how many blue and red balls are in the jar?

00:03 The number of balls in relation to the total according to the data

00:07 Multiply the total number of balls by the red portion to find the number of red ones

00:16 This is the number of red balls in the jar

00:22 Use the same method to find the number of blue balls

00:28 This is the number of blue balls

00:41 Now add the numbers of balls to find the total sum

00:46 And this is the solution to the question

Step-by-Step Solution

Let's solve the problem step-by-step:

We know that $\frac{1}{5}$ of the 15 balls are blue. Thus, the number of blue balls is calculated as:

$\text{Number of blue balls} = \frac{1}{5} \times 15 = 3$

Similarly, $\frac{1}{3}$ of the 15 balls are red. So, the number of red balls is:

$\text{Number of red balls} = \frac{1}{3} \times 15 = 5$

Sum the number of blue balls and the number of red balls:

$\text{Total number of red or blue balls} = 3 + 5 = 8$

Therefore, there are a total of 8 balls in the jar that are either red or blue.