Question

a bag contains only red, yellow and blue discs.

the probability of drawing a red disc at random is 1/2

the probability of drawing a yellow disc at random is x
the probability of drawing a blue disc at random is 4x

one disc is to be selected at random.

work out the probability that it will be a blue disc.
give your answer as a numerical value.

could someone help me please:)

Answer 1

is it 4/10
or 0.40
or 40% ?

Answer 2

one or the other

Answer 3

\[\frac{1}{2}+x+4x=1\]
\[5x=\frac{1}{2}\]
\[x=\frac{1}{10}\]

Answer 4

Probability of blue = 4/10=2/5