the ratio of red marbles to blue marbles in a jar is 5:3.If there are 40 marbles,how many blue marbles marbles are there?

asked by guest
on Nov 15, 2024 at 11:30 am



MathBot Answer:

Given:num red marbles:num blue marbles=5:3\begin{aligned}\text{num red marbles} : \text{num blue marbles} = 5 : 3\end{aligned}It follows:num red marblesnum blue marbles=53\begin{aligned}\frac{\text{num red marbles}}{\text{num blue marbles}} = \frac{5}{3}\end{aligned}If there are 40 marbles, then:num red marbles+num blue marbles=40\begin{aligned}\text{num red marbles} + \text{num blue marbles} = 40\end{aligned}Therefore:num blue marbles=35×(40−num blue marbles)=15\begin{aligned}\text{num blue marbles} = \frac{3}{5} \times \left(40 - \text{num blue marbles}\right) = 15\end{aligned}

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