Question

Can some one explain how to solve this?

Answer 1

solve this \[\frac{ \left(\begin{matrix}13 \\ 1\end{matrix}\right)+\left(\begin{matrix}10 \\ 1\end{matrix}\right) }{ \left(\begin{matrix}25 \\ 1\end{matrix}\right) }\]

Answer 2

add all the balls up to get a total amount

13+10+2=25

your probabilities are

13/25 red
10/25 brown
2/25 orange

draw tree diagrams

Answer 3

0.92?

Answer 4

yes well done

Answer 5

23/25

it is the same problem as asking
if you have 23 white balls and 2 black balls, what is the chance you would pick a white ball?

Answer 6

0.92 is correct but the instructions say "integer or simplified fraction"
Will the software take a decimal?